{"items":[{"id":"NVI-00005919","kind":"vulnerability","title":"PhpSpreadsheet has CPU Denial of Service via Unbounded Row Index in SpreadsheetML XML Reader","revision":4,"unknowns":["Customer inventory, deployment, reachability and exploitation have not been inspected.","NVD lastModified does not establish freshness of every associated CPE record."],"lifecycle":"active","identifiers":["GHSA-84wq-86v6-x5j6","CVE-2026-40863"],"plain_summary":"GitHub lists this reviewed advisory for phpoffice/phpspreadsheet, phpoffice/phpspreadsheet, phpoffice/phpspreadsheet, phpoffice/phpspreadsheet, phpoffice/phpspreadsheet. Published version ranges and source prerequisites are shown below; this is not an inspection of a visitor’s application.","review_status":"source_listed","control_topics":[],"public_actions":[{"summary":"Identify the exact component and deployed version, examine the linked publisher’s conditions, and retain evidence of any mitigation.","source_ids":["sr-106ad41e512b0c753755d95a59816fbc"],"action_type":"investigate","limitations":"Confirm current vendor support, compatibility and deployment evidence. This report has not tested a fix in your system.","current_supported_target":null},{"summary":"The original advisory lists fixed boundaries 5.7.0 for phpoffice/phpspreadsheet. Confirm the publisher’s latest guidance.","source_ids":["sr-a149a5cb19741a8b0023f84de56c9a01"],"action_type":"vendor_patch","limitations":"Confirm current vendor support, compatibility and deployment evidence. This report has not tested a fix in your system.","current_supported_target":null},{"summary":"The original advisory lists fixed boundaries 3.10.5 for phpoffice/phpspreadsheet. Confirm the publisher’s latest guidance.","source_ids":["sr-a149a5cb19741a8b0023f84de56c9a01"],"action_type":"vendor_patch","limitations":"Confirm current vendor support, compatibility and deployment evidence. This report has not tested a fix in your system.","current_supported_target":null},{"summary":"The original advisory lists fixed boundaries 2.4.5 for phpoffice/phpspreadsheet. Confirm the publisher’s latest guidance.","source_ids":["sr-a149a5cb19741a8b0023f84de56c9a01"],"action_type":"vendor_patch","limitations":"Confirm current vendor support, compatibility and deployment evidence. This report has not tested a fix in your system.","current_supported_target":null},{"summary":"The original advisory lists fixed boundaries 2.1.16 for phpoffice/phpspreadsheet. Confirm the publisher’s latest guidance.","source_ids":["sr-a149a5cb19741a8b0023f84de56c9a01"],"action_type":"vendor_patch","limitations":"Confirm current vendor support, compatibility and deployment evidence. This report has not tested a fix in your system.","current_supported_target":null},{"summary":"The original advisory lists fixed boundaries 1.30.6 for phpoffice/phpspreadsheet. Confirm the publisher’s latest guidance.","source_ids":["sr-a149a5cb19741a8b0023f84de56c9a01"],"action_type":"vendor_patch","limitations":"Confirm current vendor support, compatibility and deployment evidence. This report has not tested a fix in your system.","current_supported_target":null}],"schema_version":"1.1.0","source_metrics":[{"kind":"CVSS","as_of":"2026-10-26T20:53:09.000Z","value":"7.5 high","meaning":"GitHub source severity; exploitability and local consequence require separate evidence.","source_id":"sr-069c9f61bafb63fc8c0314d33d085dee"},{"kind":"CVSS","as_of":"2026-10-26T18:10:00.173Z","value":"7.5 HIGH (3.1)","meaning":"security-advisories@github.com severity; no combined Null risk score.","source_id":"sr-596dc81a4436fd4ba50ed3e15c842825"},{"kind":"EPSS","as_of":"2026-10-31T12:00:27.000Z","value":"0.395%","meaning":"FIRST EPSS model v2026.06.15; exploitation probability over 30 days, percentile 0.33743. Missing scores are unknown.","source_id":"sr-106ad41e512b0c753755d95a59816fbc"}],"why_it_matters":"Published affected context helps an owner decide what evidence to gather. This report has not examined your application.","related_sources":[{"id":"sr-069c9f61bafb63fc8c0314d33d085dee","url":"https://github.com/advisories/GHSA-84wq-86v6-x5j6","basis":"vendor_advisory","notes":"GitHub Advisory Database; CC-BY-4.0. Each advisory links its original attribution. Null normalizes fields.","title":"GHSA-84wq-86v6-x5j6","publisher":"GitHub Advisory Database","observed_at":"2026-10-31T22:06:46.371Z"},{"id":"sr-a149a5cb19741a8b0023f84de56c9a01","url":"https://github.com/advisories/GHSA-84wq-86v6-x5j6","basis":"vendor_advisory","notes":"GitHub-origin advisory, CC-BY-4.0; OSV is an aggregate copy, not independent corroboration.","title":"GHSA-84wq-86v6-x5j6","publisher":"GitHub Advisory Database via OSV","observed_at":"2026-10-31T21:41:59.957Z"},{"id":"sr-596dc81a4436fd4ba50ed3e15c842825","url":"https://nvd.nist.gov/vuln/detail/CVE-2026-40863","basis":"official_catalog","notes":"This product uses data from the NVD API but is not endorsed or certified by the NVD.","title":"CVE-2026-40863","publisher":"NIST National Vulnerability Database","observed_at":"2026-11-01T07:23:52.242Z"},{"id":"sr-106ad41e512b0c753755d95a59816fbc","url":"https://www.first.org/epss/data.html","basis":"official_catalog","notes":"FIRST EPSS; probability of exploitation in the next 30 days, not local compromise. Dataset date/model retained; FIRST services terms apply.","title":"CVE-2026-40863","publisher":"FIRST EPSS","observed_at":"2026-10-31T22:06:15.378Z"}],"affected_context":[{"certainty":"source_listed","source_ids":["sr-069c9f61bafb63fc8c0314d33d085dee"],"technology":"phpoffice/phpspreadsheet","known_exclusions":[],"conditions_summary":"## Summary\n\nThe SpreadsheetML XML reader (`Reader\\Xml`) does not validate the `ss:Index` row attribute against the maximum allowed row count (`AddressRange::MAX_ROW = 1,048,576`). An attacker can craft a SpreadsheetML XML file with `ss:Index=\"999999999\"` on a `` element, which inflates the internal `cachedHighestRow` to ~1 billion. Any subsequent call to `getRowIterator()` without an explicit end row will attempt to iterate ~1 billion rows, causing CPU exhaustion and denial of service.\n\n## Details\n\nIn `src/PhpSpreadsheet/Reader/Xml.php`, the `loadSpreadsheetFromFile` method processes `` elements:\n\n```php\n// Xml.php:397-402\nif (isset($row_ss['Index'])) {\n    $rowID = (int) $row_ss['Index']; // No validation against MAX_ROW\n}\nif (isset($row_ss['Hidden'])) {\n    $rowVisible = ((string) $row_ss['Hidden']) !== '1';\n    $spreadsheet->getActiveSheet()->getRowDimension($rowID)->setVisible($rowVisible);\n}\n```\n\nThe `$rowID` value read from `ss:Index` is cast to int with no upper bound check. It is then passed to `getRowDimension()`:\n\n```php\n// Worksheet.php:1342-1351\npublic function getRowDimension(int $row): RowDimension\n{\n    if (!isset($this->rowDimensions[$row])) {\n        $thi","public_affected_ranges":[">= 4.0.0, <= 5.6.0"]},{"certainty":"source_listed","source_ids":["sr-069c9f61bafb63fc8c0314d33d085dee"],"technology":"phpoffice/phpspreadsheet","known_exclusions":[],"conditions_summary":"## Summary\n\nThe SpreadsheetML XML reader (`Reader\\Xml`) does not validate the `ss:Index` row attribute against the maximum allowed row count (`AddressRange::MAX_ROW = 1,048,576`). An attacker can craft a SpreadsheetML XML file with `ss:Index=\"999999999\"` on a `` element, which inflates the internal `cachedHighestRow` to ~1 billion. Any subsequent call to `getRowIterator()` without an explicit end row will attempt to iterate ~1 billion rows, causing CPU exhaustion and denial of service.\n\n## Details\n\nIn `src/PhpSpreadsheet/Reader/Xml.php`, the `loadSpreadsheetFromFile` method processes `` elements:\n\n```php\n// Xml.php:397-402\nif (isset($row_ss['Index'])) {\n    $rowID = (int) $row_ss['Index']; // No validation against MAX_ROW\n}\nif (isset($row_ss['Hidden'])) {\n    $rowVisible = ((string) $row_ss['Hidden']) !== '1';\n    $spreadsheet->getActiveSheet()->getRowDimension($rowID)->setVisible($rowVisible);\n}\n```\n\nThe `$rowID` value read from `ss:Index` is cast to int with no upper bound check. It is then passed to `getRowDimension()`:\n\n```php\n// Worksheet.php:1342-1351\npublic function getRowDimension(int $row): RowDimension\n{\n    if (!isset($this->rowDimensions[$row])) {\n        $thi","public_affected_ranges":[">= 3.3.0, <= 3.10.4"]},{"certainty":"source_listed","source_ids":["sr-069c9f61bafb63fc8c0314d33d085dee"],"technology":"phpoffice/phpspreadsheet","known_exclusions":[],"conditions_summary":"## Summary\n\nThe SpreadsheetML XML reader (`Reader\\Xml`) does not validate the `ss:Index` row attribute against the maximum allowed row count (`AddressRange::MAX_ROW = 1,048,576`). An attacker can craft a SpreadsheetML XML file with `ss:Index=\"999999999\"` on a `` element, which inflates the internal `cachedHighestRow` to ~1 billion. Any subsequent call to `getRowIterator()` without an explicit end row will attempt to iterate ~1 billion rows, causing CPU exhaustion and denial of service.\n\n## Details\n\nIn `src/PhpSpreadsheet/Reader/Xml.php`, the `loadSpreadsheetFromFile` method processes `` elements:\n\n```php\n// Xml.php:397-402\nif (isset($row_ss['Index'])) {\n    $rowID = (int) $row_ss['Index']; // No validation against MAX_ROW\n}\nif (isset($row_ss['Hidden'])) {\n    $rowVisible = ((string) $row_ss['Hidden']) !== '1';\n    $spreadsheet->getActiveSheet()->getRowDimension($rowID)->setVisible($rowVisible);\n}\n```\n\nThe `$rowID` value read from `ss:Index` is cast to int with no upper bound check. It is then passed to `getRowDimension()`:\n\n```php\n// Worksheet.php:1342-1351\npublic function getRowDimension(int $row): RowDimension\n{\n    if (!isset($this->rowDimensions[$row])) {\n        $thi","public_affected_ranges":[">= 2.2.0, <= 2.4.4"]},{"certainty":"source_listed","source_ids":["sr-069c9f61bafb63fc8c0314d33d085dee"],"technology":"phpoffice/phpspreadsheet","known_exclusions":[],"conditions_summary":"## Summary\n\nThe SpreadsheetML XML reader (`Reader\\Xml`) does not validate the `ss:Index` row attribute against the maximum allowed row count (`AddressRange::MAX_ROW = 1,048,576`). An attacker can craft a SpreadsheetML XML file with `ss:Index=\"999999999\"` on a `` element, which inflates the internal `cachedHighestRow` to ~1 billion. Any subsequent call to `getRowIterator()` without an explicit end row will attempt to iterate ~1 billion rows, causing CPU exhaustion and denial of service.\n\n## Details\n\nIn `src/PhpSpreadsheet/Reader/Xml.php`, the `loadSpreadsheetFromFile` method processes `` elements:\n\n```php\n// Xml.php:397-402\nif (isset($row_ss['Index'])) {\n    $rowID = (int) $row_ss['Index']; // No validation against MAX_ROW\n}\nif (isset($row_ss['Hidden'])) {\n    $rowVisible = ((string) $row_ss['Hidden']) !== '1';\n    $spreadsheet->getActiveSheet()->getRowDimension($rowID)->setVisible($rowVisible);\n}\n```\n\nThe `$rowID` value read from `ss:Index` is cast to int with no upper bound check. It is then passed to `getRowDimension()`:\n\n```php\n// Worksheet.php:1342-1351\npublic function getRowDimension(int $row): RowDimension\n{\n    if (!isset($this->rowDimensions[$row])) {\n        $thi","public_affected_ranges":[">= 2.0.0, <= 2.1.15"]},{"certainty":"source_listed","source_ids":["sr-069c9f61bafb63fc8c0314d33d085dee"],"technology":"phpoffice/phpspreadsheet","known_exclusions":[],"conditions_summary":"## Summary\n\nThe SpreadsheetML XML reader (`Reader\\Xml`) does not validate the `ss:Index` row attribute against the maximum allowed row count (`AddressRange::MAX_ROW = 1,048,576`). An attacker can craft a SpreadsheetML XML file with `ss:Index=\"999999999\"` on a `` element, which inflates the internal `cachedHighestRow` to ~1 billion. Any subsequent call to `getRowIterator()` without an explicit end row will attempt to iterate ~1 billion rows, causing CPU exhaustion and denial of service.\n\n## Details\n\nIn `src/PhpSpreadsheet/Reader/Xml.php`, the `loadSpreadsheetFromFile` method processes `` elements:\n\n```php\n// Xml.php:397-402\nif (isset($row_ss['Index'])) {\n    $rowID = (int) $row_ss['Index']; // No validation against MAX_ROW\n}\nif (isset($row_ss['Hidden'])) {\n    $rowVisible = ((string) $row_ss['Hidden']) !== '1';\n    $spreadsheet->getActiveSheet()->getRowDimension($rowID)->setVisible($rowVisible);\n}\n```\n\nThe `$rowID` value read from `ss:Index` is cast to int with no upper bound check. It is then passed to `getRowDimension()`:\n\n```php\n// Worksheet.php:1342-1351\npublic function getRowDimension(int $row): RowDimension\n{\n    if (!isset($this->rowDimensions[$row])) {\n        $thi","public_affected_ranges":["<= 1.30.5"]},{"certainty":"source_listed","source_ids":["sr-a149a5cb19741a8b0023f84de56c9a01"],"technology":"phpoffice/phpspreadsheet","known_exclusions":[],"conditions_summary":"## Summary\n\nThe SpreadsheetML XML reader (`Reader\\Xml`) does not validate the `ss:Index` row attribute against the maximum allowed row count (`AddressRange::MAX_ROW = 1,048,576`). An attacker can craft a SpreadsheetML XML file with `ss:Index=\"999999999\"` on a `` element, which inflates the internal `cachedHighestRow` to ~1 billion. Any subsequent call to `getRowIterator()` without an explicit end row will attempt to iterate ~1 billion rows, causing CPU exhaustion and denial of service.\n\n## Details\n\nIn `src/PhpSpreadsheet/Reader/Xml.php`, the `loadSpreadsheetFromFile` method processes `` elements:\n\n```php\n// Xml.php:397-402\nif (isset($row_ss['Index'])) {\n    $rowID = (int) $row_ss['Index']; // No validation against MAX_ROW\n}\nif (isset($row_ss['Hidden'])) {\n    $rowVisible = ((string) $row_ss['Hidden']) !== '1';\n    $spreadsheet->getActiveSheet()->getRowDimension($rowID)->setVisible($rowVisible);\n}\n```\n\nThe `$rowID` value read from `ss:Index` is cast to int with no upper bound check. It is then passed to `getRowDimension()`:\n\n```php\n// Worksheet.php:1342-1351\npublic function getRowDimension(int $row): RowDimension\n{\n    if (!isset($this->rowDimensions[$row])) {\n        $thi","public_affected_ranges":["ECOSYSTEM: introduced 4.0.0; fixed 5.7.0"]},{"certainty":"source_listed","source_ids":["sr-a149a5cb19741a8b0023f84de56c9a01"],"technology":"phpoffice/phpspreadsheet","known_exclusions":[],"conditions_summary":"## Summary\n\nThe SpreadsheetML XML reader (`Reader\\Xml`) does not validate the `ss:Index` row attribute against the maximum allowed row count (`AddressRange::MAX_ROW = 1,048,576`). An attacker can craft a SpreadsheetML XML file with `ss:Index=\"999999999\"` on a `` element, which inflates the internal `cachedHighestRow` to ~1 billion. Any subsequent call to `getRowIterator()` without an explicit end row will attempt to iterate ~1 billion rows, causing CPU exhaustion and denial of service.\n\n## Details\n\nIn `src/PhpSpreadsheet/Reader/Xml.php`, the `loadSpreadsheetFromFile` method processes `` elements:\n\n```php\n// Xml.php:397-402\nif (isset($row_ss['Index'])) {\n    $rowID = (int) $row_ss['Index']; // No validation against MAX_ROW\n}\nif (isset($row_ss['Hidden'])) {\n    $rowVisible = ((string) $row_ss['Hidden']) !== '1';\n    $spreadsheet->getActiveSheet()->getRowDimension($rowID)->setVisible($rowVisible);\n}\n```\n\nThe `$rowID` value read from `ss:Index` is cast to int with no upper bound check. It is then passed to `getRowDimension()`:\n\n```php\n// Worksheet.php:1342-1351\npublic function getRowDimension(int $row): RowDimension\n{\n    if (!isset($this->rowDimensions[$row])) {\n        $thi","public_affected_ranges":["ECOSYSTEM: introduced 3.3.0; fixed 3.10.5"]},{"certainty":"source_listed","source_ids":["sr-a149a5cb19741a8b0023f84de56c9a01"],"technology":"phpoffice/phpspreadsheet","known_exclusions":[],"conditions_summary":"## Summary\n\nThe SpreadsheetML XML reader (`Reader\\Xml`) does not validate the `ss:Index` row attribute against the maximum allowed row count (`AddressRange::MAX_ROW = 1,048,576`). An attacker can craft a SpreadsheetML XML file with `ss:Index=\"999999999\"` on a `` element, which inflates the internal `cachedHighestRow` to ~1 billion. Any subsequent call to `getRowIterator()` without an explicit end row will attempt to iterate ~1 billion rows, causing CPU exhaustion and denial of service.\n\n## Details\n\nIn `src/PhpSpreadsheet/Reader/Xml.php`, the `loadSpreadsheetFromFile` method processes `` elements:\n\n```php\n// Xml.php:397-402\nif (isset($row_ss['Index'])) {\n    $rowID = (int) $row_ss['Index']; // No validation against MAX_ROW\n}\nif (isset($row_ss['Hidden'])) {\n    $rowVisible = ((string) $row_ss['Hidden']) !== '1';\n    $spreadsheet->getActiveSheet()->getRowDimension($rowID)->setVisible($rowVisible);\n}\n```\n\nThe `$rowID` value read from `ss:Index` is cast to int with no upper bound check. It is then passed to `getRowDimension()`:\n\n```php\n// Worksheet.php:1342-1351\npublic function getRowDimension(int $row): RowDimension\n{\n    if (!isset($this->rowDimensions[$row])) {\n        $thi","public_affected_ranges":["ECOSYSTEM: introduced 2.2.0; fixed 2.4.5"]},{"certainty":"source_listed","source_ids":["sr-a149a5cb19741a8b0023f84de56c9a01"],"technology":"phpoffice/phpspreadsheet","known_exclusions":[],"conditions_summary":"## Summary\n\nThe SpreadsheetML XML reader (`Reader\\Xml`) does not validate the `ss:Index` row attribute against the maximum allowed row count (`AddressRange::MAX_ROW = 1,048,576`). An attacker can craft a SpreadsheetML XML file with `ss:Index=\"999999999\"` on a `` element, which inflates the internal `cachedHighestRow` to ~1 billion. Any subsequent call to `getRowIterator()` without an explicit end row will attempt to iterate ~1 billion rows, causing CPU exhaustion and denial of service.\n\n## Details\n\nIn `src/PhpSpreadsheet/Reader/Xml.php`, the `loadSpreadsheetFromFile` method processes `` elements:\n\n```php\n// Xml.php:397-402\nif (isset($row_ss['Index'])) {\n    $rowID = (int) $row_ss['Index']; // No validation against MAX_ROW\n}\nif (isset($row_ss['Hidden'])) {\n    $rowVisible = ((string) $row_ss['Hidden']) !== '1';\n    $spreadsheet->getActiveSheet()->getRowDimension($rowID)->setVisible($rowVisible);\n}\n```\n\nThe `$rowID` value read from `ss:Index` is cast to int with no upper bound check. It is then passed to `getRowDimension()`:\n\n```php\n// Worksheet.php:1342-1351\npublic function getRowDimension(int $row): RowDimension\n{\n    if (!isset($this->rowDimensions[$row])) {\n        $thi","public_affected_ranges":["ECOSYSTEM: introduced 2.0.0; fixed 2.1.16"]},{"certainty":"source_listed","source_ids":["sr-a149a5cb19741a8b0023f84de56c9a01"],"technology":"phpoffice/phpspreadsheet","known_exclusions":[],"conditions_summary":"## Summary\n\nThe SpreadsheetML XML reader (`Reader\\Xml`) does not validate the `ss:Index` row attribute against the maximum allowed row count (`AddressRange::MAX_ROW = 1,048,576`). An attacker can craft a SpreadsheetML XML file with `ss:Index=\"999999999\"` on a `` element, which inflates the internal `cachedHighestRow` to ~1 billion. Any subsequent call to `getRowIterator()` without an explicit end row will attempt to iterate ~1 billion rows, causing CPU exhaustion and denial of service.\n\n## Details\n\nIn `src/PhpSpreadsheet/Reader/Xml.php`, the `loadSpreadsheetFromFile` method processes `` elements:\n\n```php\n// Xml.php:397-402\nif (isset($row_ss['Index'])) {\n    $rowID = (int) $row_ss['Index']; // No validation against MAX_ROW\n}\nif (isset($row_ss['Hidden'])) {\n    $rowVisible = ((string) $row_ss['Hidden']) !== '1';\n    $spreadsheet->getActiveSheet()->getRowDimension($rowID)->setVisible($rowVisible);\n}\n```\n\nThe `$rowID` value read from `ss:Index` is cast to int with no upper bound check. It is then passed to `getRowDimension()`:\n\n```php\n// Worksheet.php:1342-1351\npublic function getRowDimension(int $row): RowDimension\n{\n    if (!isset($this->rowDimensions[$row])) {\n        $thi","public_affected_ranges":["ECOSYSTEM: introduced 0; fixed 1.30.6"]}],"null_published_at":"2026-11-02T20:21:10.267Z","source_updated_at":"2026-10-26T20:53:09.000Z","source_disclosed_at":"2026-04-29T20:23:27.000Z","is_synthetic_fixture":false,"null_last_reviewed_at":null,"public_change_summary":"Source facts changed; compare the preserved prior revision.","null_first_observed_at":"2026-10-31T21:41:59.957Z"},{"id":"NVI-00005919","kind":"vulnerability","title":"PhpSpreadsheet has CPU Denial of Service via Unbounded Row Index in SpreadsheetML XML Reader","revision":3,"unknowns":["Customer inventory, deployment, reachability and exploitation have not been inspected."],"lifecycle":"active","identifiers":["GHSA-84wq-86v6-x5j6","CVE-2026-40863"],"plain_summary":"GitHub lists this reviewed advisory for phpoffice/phpspreadsheet, phpoffice/phpspreadsheet, phpoffice/phpspreadsheet, phpoffice/phpspreadsheet, phpoffice/phpspreadsheet. Published version ranges and source prerequisites are shown below; this is not an inspection of a visitor’s application.","review_status":"source_listed","control_topics":[],"public_actions":[{"summary":"Identify the exact component and deployed version, examine the linked publisher’s conditions, and retain evidence of any mitigation.","source_ids":["sr-106ad41e512b0c753755d95a59816fbc"],"action_type":"investigate","limitations":"Confirm current vendor support, compatibility and deployment evidence. This report has not tested a fix in your system.","current_supported_target":null},{"summary":"The original advisory lists fixed boundaries 5.7.0 for phpoffice/phpspreadsheet. Confirm the publisher’s latest guidance.","source_ids":["sr-a149a5cb19741a8b0023f84de56c9a01"],"action_type":"vendor_patch","limitations":"Confirm current vendor support, compatibility and deployment evidence. This report has not tested a fix in your system.","current_supported_target":null},{"summary":"The original advisory lists fixed boundaries 3.10.5 for phpoffice/phpspreadsheet. Confirm the publisher’s latest guidance.","source_ids":["sr-a149a5cb19741a8b0023f84de56c9a01"],"action_type":"vendor_patch","limitations":"Confirm current vendor support, compatibility and deployment evidence. This report has not tested a fix in your system.","current_supported_target":null},{"summary":"The original advisory lists fixed boundaries 2.4.5 for phpoffice/phpspreadsheet. Confirm the publisher’s latest guidance.","source_ids":["sr-a149a5cb19741a8b0023f84de56c9a01"],"action_type":"vendor_patch","limitations":"Confirm current vendor support, compatibility and deployment evidence. This report has not tested a fix in your system.","current_supported_target":null},{"summary":"The original advisory lists fixed boundaries 2.1.16 for phpoffice/phpspreadsheet. Confirm the publisher’s latest guidance.","source_ids":["sr-a149a5cb19741a8b0023f84de56c9a01"],"action_type":"vendor_patch","limitations":"Confirm current vendor support, compatibility and deployment evidence. This report has not tested a fix in your system.","current_supported_target":null},{"summary":"The original advisory lists fixed boundaries 1.30.6 for phpoffice/phpspreadsheet. Confirm the publisher’s latest guidance.","source_ids":["sr-a149a5cb19741a8b0023f84de56c9a01"],"action_type":"vendor_patch","limitations":"Confirm current vendor support, compatibility and deployment evidence. This report has not tested a fix in your system.","current_supported_target":null}],"schema_version":"1.1.0","source_metrics":[{"kind":"CVSS","as_of":"2026-10-26T20:53:09.000Z","value":"7.5 high","meaning":"GitHub source severity; exploitability and local consequence require separate evidence.","source_id":"sr-069c9f61bafb63fc8c0314d33d085dee"},{"kind":"EPSS","as_of":"2026-10-31T12:00:27.000Z","value":"0.395%","meaning":"FIRST EPSS model v2026.06.15; exploitation probability over 30 days, percentile 0.33743. Missing scores are unknown.","source_id":"sr-106ad41e512b0c753755d95a59816fbc"}],"why_it_matters":"Published affected context helps an owner decide what evidence to gather. This report has not examined your application.","related_sources":[{"id":"sr-069c9f61bafb63fc8c0314d33d085dee","url":"https://github.com/advisories/GHSA-84wq-86v6-x5j6","basis":"vendor_advisory","notes":"GitHub Advisory Database; CC-BY-4.0. Each advisory links its original attribution. Null normalizes fields.","title":"GHSA-84wq-86v6-x5j6","publisher":"GitHub Advisory Database","observed_at":"2026-10-31T22:06:46.371Z"},{"id":"sr-a149a5cb19741a8b0023f84de56c9a01","url":"https://github.com/advisories/GHSA-84wq-86v6-x5j6","basis":"vendor_advisory","notes":"GitHub-origin advisory, CC-BY-4.0; OSV is an aggregate copy, not independent corroboration.","title":"GHSA-84wq-86v6-x5j6","publisher":"GitHub Advisory Database via OSV","observed_at":"2026-10-31T21:41:59.957Z"},{"id":"sr-106ad41e512b0c753755d95a59816fbc","url":"https://www.first.org/epss/data.html","basis":"official_catalog","notes":"FIRST EPSS; probability of exploitation in the next 30 days, not local compromise. Dataset date/model retained; FIRST services terms apply.","title":"CVE-2026-40863","publisher":"FIRST EPSS","observed_at":"2026-10-31T22:06:15.378Z"}],"affected_context":[{"certainty":"source_listed","source_ids":["sr-069c9f61bafb63fc8c0314d33d085dee"],"technology":"phpoffice/phpspreadsheet","known_exclusions":[],"conditions_summary":"## Summary\n\nThe SpreadsheetML XML reader (`Reader\\Xml`) does not validate the `ss:Index` row attribute against the maximum allowed row count (`AddressRange::MAX_ROW = 1,048,576`). An attacker can craft a SpreadsheetML XML file with `ss:Index=\"999999999\"` on a `` element, which inflates the internal `cachedHighestRow` to ~1 billion. Any subsequent call to `getRowIterator()` without an explicit end row will attempt to iterate ~1 billion rows, causing CPU exhaustion and denial of service.\n\n## Details\n\nIn `src/PhpSpreadsheet/Reader/Xml.php`, the `loadSpreadsheetFromFile` method processes `` elements:\n\n```php\n// Xml.php:397-402\nif (isset($row_ss['Index'])) {\n    $rowID = (int) $row_ss['Index']; // No validation against MAX_ROW\n}\nif (isset($row_ss['Hidden'])) {\n    $rowVisible = ((string) $row_ss['Hidden']) !== '1';\n    $spreadsheet->getActiveSheet()->getRowDimension($rowID)->setVisible($rowVisible);\n}\n```\n\nThe `$rowID` value read from `ss:Index` is cast to int with no upper bound check. It is then passed to `getRowDimension()`:\n\n```php\n// Worksheet.php:1342-1351\npublic function getRowDimension(int $row): RowDimension\n{\n    if (!isset($this->rowDimensions[$row])) {\n        $thi","public_affected_ranges":[">= 4.0.0, <= 5.6.0"]},{"certainty":"source_listed","source_ids":["sr-069c9f61bafb63fc8c0314d33d085dee"],"technology":"phpoffice/phpspreadsheet","known_exclusions":[],"conditions_summary":"## Summary\n\nThe SpreadsheetML XML reader (`Reader\\Xml`) does not validate the `ss:Index` row attribute against the maximum allowed row count (`AddressRange::MAX_ROW = 1,048,576`). An attacker can craft a SpreadsheetML XML file with `ss:Index=\"999999999\"` on a `` element, which inflates the internal `cachedHighestRow` to ~1 billion. Any subsequent call to `getRowIterator()` without an explicit end row will attempt to iterate ~1 billion rows, causing CPU exhaustion and denial of service.\n\n## Details\n\nIn `src/PhpSpreadsheet/Reader/Xml.php`, the `loadSpreadsheetFromFile` method processes `` elements:\n\n```php\n// Xml.php:397-402\nif (isset($row_ss['Index'])) {\n    $rowID = (int) $row_ss['Index']; // No validation against MAX_ROW\n}\nif (isset($row_ss['Hidden'])) {\n    $rowVisible = ((string) $row_ss['Hidden']) !== '1';\n    $spreadsheet->getActiveSheet()->getRowDimension($rowID)->setVisible($rowVisible);\n}\n```\n\nThe `$rowID` value read from `ss:Index` is cast to int with no upper bound check. It is then passed to `getRowDimension()`:\n\n```php\n// Worksheet.php:1342-1351\npublic function getRowDimension(int $row): RowDimension\n{\n    if (!isset($this->rowDimensions[$row])) {\n        $thi","public_affected_ranges":[">= 3.3.0, <= 3.10.4"]},{"certainty":"source_listed","source_ids":["sr-069c9f61bafb63fc8c0314d33d085dee"],"technology":"phpoffice/phpspreadsheet","known_exclusions":[],"conditions_summary":"## Summary\n\nThe SpreadsheetML XML reader (`Reader\\Xml`) does not validate the `ss:Index` row attribute against the maximum allowed row count (`AddressRange::MAX_ROW = 1,048,576`). An attacker can craft a SpreadsheetML XML file with `ss:Index=\"999999999\"` on a `` element, which inflates the internal `cachedHighestRow` to ~1 billion. Any subsequent call to `getRowIterator()` without an explicit end row will attempt to iterate ~1 billion rows, causing CPU exhaustion and denial of service.\n\n## Details\n\nIn `src/PhpSpreadsheet/Reader/Xml.php`, the `loadSpreadsheetFromFile` method processes `` elements:\n\n```php\n// Xml.php:397-402\nif (isset($row_ss['Index'])) {\n    $rowID = (int) $row_ss['Index']; // No validation against MAX_ROW\n}\nif (isset($row_ss['Hidden'])) {\n    $rowVisible = ((string) $row_ss['Hidden']) !== '1';\n    $spreadsheet->getActiveSheet()->getRowDimension($rowID)->setVisible($rowVisible);\n}\n```\n\nThe `$rowID` value read from `ss:Index` is cast to int with no upper bound check. It is then passed to `getRowDimension()`:\n\n```php\n// Worksheet.php:1342-1351\npublic function getRowDimension(int $row): RowDimension\n{\n    if (!isset($this->rowDimensions[$row])) {\n        $thi","public_affected_ranges":[">= 2.2.0, <= 2.4.4"]},{"certainty":"source_listed","source_ids":["sr-069c9f61bafb63fc8c0314d33d085dee"],"technology":"phpoffice/phpspreadsheet","known_exclusions":[],"conditions_summary":"## Summary\n\nThe SpreadsheetML XML reader (`Reader\\Xml`) does not validate the `ss:Index` row attribute against the maximum allowed row count (`AddressRange::MAX_ROW = 1,048,576`). An attacker can craft a SpreadsheetML XML file with `ss:Index=\"999999999\"` on a `` element, which inflates the internal `cachedHighestRow` to ~1 billion. Any subsequent call to `getRowIterator()` without an explicit end row will attempt to iterate ~1 billion rows, causing CPU exhaustion and denial of service.\n\n## Details\n\nIn `src/PhpSpreadsheet/Reader/Xml.php`, the `loadSpreadsheetFromFile` method processes `` elements:\n\n```php\n// Xml.php:397-402\nif (isset($row_ss['Index'])) {\n    $rowID = (int) $row_ss['Index']; // No validation against MAX_ROW\n}\nif (isset($row_ss['Hidden'])) {\n    $rowVisible = ((string) $row_ss['Hidden']) !== '1';\n    $spreadsheet->getActiveSheet()->getRowDimension($rowID)->setVisible($rowVisible);\n}\n```\n\nThe `$rowID` value read from `ss:Index` is cast to int with no upper bound check. It is then passed to `getRowDimension()`:\n\n```php\n// Worksheet.php:1342-1351\npublic function getRowDimension(int $row): RowDimension\n{\n    if (!isset($this->rowDimensions[$row])) {\n        $thi","public_affected_ranges":[">= 2.0.0, <= 2.1.15"]},{"certainty":"source_listed","source_ids":["sr-069c9f61bafb63fc8c0314d33d085dee"],"technology":"phpoffice/phpspreadsheet","known_exclusions":[],"conditions_summary":"## Summary\n\nThe SpreadsheetML XML reader (`Reader\\Xml`) does not validate the `ss:Index` row attribute against the maximum allowed row count (`AddressRange::MAX_ROW = 1,048,576`). An attacker can craft a SpreadsheetML XML file with `ss:Index=\"999999999\"` on a `` element, which inflates the internal `cachedHighestRow` to ~1 billion. Any subsequent call to `getRowIterator()` without an explicit end row will attempt to iterate ~1 billion rows, causing CPU exhaustion and denial of service.\n\n## Details\n\nIn `src/PhpSpreadsheet/Reader/Xml.php`, the `loadSpreadsheetFromFile` method processes `` elements:\n\n```php\n// Xml.php:397-402\nif (isset($row_ss['Index'])) {\n    $rowID = (int) $row_ss['Index']; // No validation against MAX_ROW\n}\nif (isset($row_ss['Hidden'])) {\n    $rowVisible = ((string) $row_ss['Hidden']) !== '1';\n    $spreadsheet->getActiveSheet()->getRowDimension($rowID)->setVisible($rowVisible);\n}\n```\n\nThe `$rowID` value read from `ss:Index` is cast to int with no upper bound check. It is then passed to `getRowDimension()`:\n\n```php\n// Worksheet.php:1342-1351\npublic function getRowDimension(int $row): RowDimension\n{\n    if (!isset($this->rowDimensions[$row])) {\n        $thi","public_affected_ranges":["<= 1.30.5"]},{"certainty":"source_listed","source_ids":["sr-a149a5cb19741a8b0023f84de56c9a01"],"technology":"phpoffice/phpspreadsheet","known_exclusions":[],"conditions_summary":"## Summary\n\nThe SpreadsheetML XML reader (`Reader\\Xml`) does not validate the `ss:Index` row attribute against the maximum allowed row count (`AddressRange::MAX_ROW = 1,048,576`). An attacker can craft a SpreadsheetML XML file with `ss:Index=\"999999999\"` on a `` element, which inflates the internal `cachedHighestRow` to ~1 billion. Any subsequent call to `getRowIterator()` without an explicit end row will attempt to iterate ~1 billion rows, causing CPU exhaustion and denial of service.\n\n## Details\n\nIn `src/PhpSpreadsheet/Reader/Xml.php`, the `loadSpreadsheetFromFile` method processes `` elements:\n\n```php\n// Xml.php:397-402\nif (isset($row_ss['Index'])) {\n    $rowID = (int) $row_ss['Index']; // No validation against MAX_ROW\n}\nif (isset($row_ss['Hidden'])) {\n    $rowVisible = ((string) $row_ss['Hidden']) !== '1';\n    $spreadsheet->getActiveSheet()->getRowDimension($rowID)->setVisible($rowVisible);\n}\n```\n\nThe `$rowID` value read from `ss:Index` is cast to int with no upper bound check. It is then passed to `getRowDimension()`:\n\n```php\n// Worksheet.php:1342-1351\npublic function getRowDimension(int $row): RowDimension\n{\n    if (!isset($this->rowDimensions[$row])) {\n        $thi","public_affected_ranges":["ECOSYSTEM: introduced 4.0.0; fixed 5.7.0"]},{"certainty":"source_listed","source_ids":["sr-a149a5cb19741a8b0023f84de56c9a01"],"technology":"phpoffice/phpspreadsheet","known_exclusions":[],"conditions_summary":"## Summary\n\nThe SpreadsheetML XML reader (`Reader\\Xml`) does not validate the `ss:Index` row attribute against the maximum allowed row count (`AddressRange::MAX_ROW = 1,048,576`). An attacker can craft a SpreadsheetML XML file with `ss:Index=\"999999999\"` on a `` element, which inflates the internal `cachedHighestRow` to ~1 billion. Any subsequent call to `getRowIterator()` without an explicit end row will attempt to iterate ~1 billion rows, causing CPU exhaustion and denial of service.\n\n## Details\n\nIn `src/PhpSpreadsheet/Reader/Xml.php`, the `loadSpreadsheetFromFile` method processes `` elements:\n\n```php\n// Xml.php:397-402\nif (isset($row_ss['Index'])) {\n    $rowID = (int) $row_ss['Index']; // No validation against MAX_ROW\n}\nif (isset($row_ss['Hidden'])) {\n    $rowVisible = ((string) $row_ss['Hidden']) !== '1';\n    $spreadsheet->getActiveSheet()->getRowDimension($rowID)->setVisible($rowVisible);\n}\n```\n\nThe `$rowID` value read from `ss:Index` is cast to int with no upper bound check. It is then passed to `getRowDimension()`:\n\n```php\n// Worksheet.php:1342-1351\npublic function getRowDimension(int $row): RowDimension\n{\n    if (!isset($this->rowDimensions[$row])) {\n        $thi","public_affected_ranges":["ECOSYSTEM: introduced 3.3.0; fixed 3.10.5"]},{"certainty":"source_listed","source_ids":["sr-a149a5cb19741a8b0023f84de56c9a01"],"technology":"phpoffice/phpspreadsheet","known_exclusions":[],"conditions_summary":"## Summary\n\nThe SpreadsheetML XML reader (`Reader\\Xml`) does not validate the `ss:Index` row attribute against the maximum allowed row count (`AddressRange::MAX_ROW = 1,048,576`). An attacker can craft a SpreadsheetML XML file with `ss:Index=\"999999999\"` on a `` element, which inflates the internal `cachedHighestRow` to ~1 billion. Any subsequent call to `getRowIterator()` without an explicit end row will attempt to iterate ~1 billion rows, causing CPU exhaustion and denial of service.\n\n## Details\n\nIn `src/PhpSpreadsheet/Reader/Xml.php`, the `loadSpreadsheetFromFile` method processes `` elements:\n\n```php\n// Xml.php:397-402\nif (isset($row_ss['Index'])) {\n    $rowID = (int) $row_ss['Index']; // No validation against MAX_ROW\n}\nif (isset($row_ss['Hidden'])) {\n    $rowVisible = ((string) $row_ss['Hidden']) !== '1';\n    $spreadsheet->getActiveSheet()->getRowDimension($rowID)->setVisible($rowVisible);\n}\n```\n\nThe `$rowID` value read from `ss:Index` is cast to int with no upper bound check. It is then passed to `getRowDimension()`:\n\n```php\n// Worksheet.php:1342-1351\npublic function getRowDimension(int $row): RowDimension\n{\n    if (!isset($this->rowDimensions[$row])) {\n        $thi","public_affected_ranges":["ECOSYSTEM: introduced 2.2.0; fixed 2.4.5"]},{"certainty":"source_listed","source_ids":["sr-a149a5cb19741a8b0023f84de56c9a01"],"technology":"phpoffice/phpspreadsheet","known_exclusions":[],"conditions_summary":"## Summary\n\nThe SpreadsheetML XML reader (`Reader\\Xml`) does not validate the `ss:Index` row attribute against the maximum allowed row count (`AddressRange::MAX_ROW = 1,048,576`). An attacker can craft a SpreadsheetML XML file with `ss:Index=\"999999999\"` on a `` element, which inflates the internal `cachedHighestRow` to ~1 billion. Any subsequent call to `getRowIterator()` without an explicit end row will attempt to iterate ~1 billion rows, causing CPU exhaustion and denial of service.\n\n## Details\n\nIn `src/PhpSpreadsheet/Reader/Xml.php`, the `loadSpreadsheetFromFile` method processes `` elements:\n\n```php\n// Xml.php:397-402\nif (isset($row_ss['Index'])) {\n    $rowID = (int) $row_ss['Index']; // No validation against MAX_ROW\n}\nif (isset($row_ss['Hidden'])) {\n    $rowVisible = ((string) $row_ss['Hidden']) !== '1';\n    $spreadsheet->getActiveSheet()->getRowDimension($rowID)->setVisible($rowVisible);\n}\n```\n\nThe `$rowID` value read from `ss:Index` is cast to int with no upper bound check. It is then passed to `getRowDimension()`:\n\n```php\n// Worksheet.php:1342-1351\npublic function getRowDimension(int $row): RowDimension\n{\n    if (!isset($this->rowDimensions[$row])) {\n        $thi","public_affected_ranges":["ECOSYSTEM: introduced 2.0.0; fixed 2.1.16"]},{"certainty":"source_listed","source_ids":["sr-a149a5cb19741a8b0023f84de56c9a01"],"technology":"phpoffice/phpspreadsheet","known_exclusions":[],"conditions_summary":"## Summary\n\nThe SpreadsheetML XML reader (`Reader\\Xml`) does not validate the `ss:Index` row attribute against the maximum allowed row count (`AddressRange::MAX_ROW = 1,048,576`). An attacker can craft a SpreadsheetML XML file with `ss:Index=\"999999999\"` on a `` element, which inflates the internal `cachedHighestRow` to ~1 billion. Any subsequent call to `getRowIterator()` without an explicit end row will attempt to iterate ~1 billion rows, causing CPU exhaustion and denial of service.\n\n## Details\n\nIn `src/PhpSpreadsheet/Reader/Xml.php`, the `loadSpreadsheetFromFile` method processes `` elements:\n\n```php\n// Xml.php:397-402\nif (isset($row_ss['Index'])) {\n    $rowID = (int) $row_ss['Index']; // No validation against MAX_ROW\n}\nif (isset($row_ss['Hidden'])) {\n    $rowVisible = ((string) $row_ss['Hidden']) !== '1';\n    $spreadsheet->getActiveSheet()->getRowDimension($rowID)->setVisible($rowVisible);\n}\n```\n\nThe `$rowID` value read from `ss:Index` is cast to int with no upper bound check. It is then passed to `getRowDimension()`:\n\n```php\n// Worksheet.php:1342-1351\npublic function getRowDimension(int $row): RowDimension\n{\n    if (!isset($this->rowDimensions[$row])) {\n        $thi","public_affected_ranges":["ECOSYSTEM: introduced 0; fixed 1.30.6"]}],"null_published_at":"2026-10-31T22:13:48.414Z","source_updated_at":"2026-10-26T20:53:09.000Z","source_disclosed_at":"2026-04-29T20:23:27.000Z","is_synthetic_fixture":false,"null_last_reviewed_at":null,"public_change_summary":"Source facts changed; compare the preserved prior revision.","null_first_observed_at":"2026-10-31T21:41:59.957Z"}],"next_cursor":null,"snapshot_revision":"42594"}