{"items":[{"id":"NVI-00004891","kind":"vulnerability","title":"Kimai vulnerable to formula Injection via tag names in XLSX export","revision":3,"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-3xc2-h5r3-wv3r","CVE-2026-42267"],"plain_summary":"GitHub lists this reviewed advisory for kimai/kimai. 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-2d0d9e97a248983dd19350c137596431"],"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 2.54.0 for kimai/kimai. Confirm the publisher’s latest guidance.","source_ids":["sr-77c6a3ab5b6c6f0259a4019f6daf6d59"],"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":"2026-05-14T20:31:09.000Z","value":"5.7 medium","meaning":"GitHub source severity; exploitability and local consequence require separate evidence.","source_id":"sr-2198896369901144d2f78fc52274de24"},{"kind":"CVSS","as_of":"2026-06-17T10:47:36.330Z","value":"5.7 MEDIUM (3.1)","meaning":"nvd@nist.gov severity; no combined Null risk score.","source_id":"sr-2d0d9e97a248983dd19350c137596431"},{"kind":"CVSS","as_of":"2026-06-17T10:47:36.330Z","value":"5.4 MEDIUM (4.0)","meaning":"security-advisories@github.com severity; no combined Null risk score.","source_id":"sr-2d0d9e97a248983dd19350c137596431"}],"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-2198896369901144d2f78fc52274de24","url":"https://github.com/advisories/GHSA-3xc2-h5r3-wv3r","basis":"vendor_advisory","notes":"GitHub Advisory Database; CC-BY-4.0. Each advisory links its original attribution. Null normalizes fields.","title":"GHSA-3xc2-h5r3-wv3r","publisher":"GitHub Advisory Database","observed_at":"2026-11-08T08:04:57.288Z"},{"id":"sr-77c6a3ab5b6c6f0259a4019f6daf6d59","url":"https://github.com/advisories/GHSA-3xc2-h5r3-wv3r","basis":"vendor_advisory","notes":"GitHub-origin advisory, CC-BY-4.0; OSV is an aggregate copy, not independent corroboration.","title":"GHSA-3xc2-h5r3-wv3r","publisher":"GitHub Advisory Database via OSV","observed_at":"2026-10-31T21:41:49.661Z"},{"id":"sr-2d0d9e97a248983dd19350c137596431","url":"https://nvd.nist.gov/vuln/detail/CVE-2026-42267","basis":"official_catalog","notes":"This product uses data from the NVD API but is not endorsed or certified by the NVD.","title":"CVE-2026-42267","publisher":"NIST National Vulnerability Database","observed_at":"2026-11-01T07:24:02.489Z"}],"affected_context":[{"certainty":"source_listed","source_ids":["sr-2198896369901144d2f78fc52274de24"],"technology":"kimai/kimai","known_exclusions":[],"conditions_summary":"## Summary\n\nAny `ROLE_USER` can create a tag with a formula string as its name (e.g. `=SUM(54+51)`) via `POST /api/tags` and assign it to a timesheet. When an admin exports timesheets to XLSX, `ArrayFormatter.formatValue()` joins tag names with `implode()` and returns the result unchanged. OpenSpout promotes any `=`-prefixed string to a `FormulaCell`, writing `SUM(54+51)` into the XLSX archive. Excel evaluates the formula when the file is opened.\n\n## Details\n\n### 1. `ArrayFormatter` does not sanitize before returning\n\n`sanitizeDDE()` exists on `StringHelper` and is called by `TextFormatter`, but `ArrayFormatter` never calls it.\n```php\n// src/Export/Package/CellFormatter/ArrayFormatter.php:24\nreturn implode(', ', $value);  // no sanitizeDDE() call\n```\n\n### 2. Tag name validation does not block formula trigger characters\n\nThe API blocks commas in tag names but permits `=`, `+`, `-`, and `@` - all valid formula prefixes in Excel and LibreOffice Calc.\n\n### 3. OpenSpout silently promotes strings to formula cells\n\n`Cell::fromValue(\"=SUM(54+51)\")` returns a `FormulaCell` with no warning.\n\n### PoC\n\n1. It logs in as normal user, creates tag `=SUM(54+51)`, assigns it to a timesheet.\n2","public_affected_ranges":[">= 2.27.0, <= 2.53.0"]},{"certainty":"source_listed","source_ids":["sr-77c6a3ab5b6c6f0259a4019f6daf6d59"],"technology":"kimai/kimai","known_exclusions":[],"conditions_summary":"## Summary\n\nAny `ROLE_USER` can create a tag with a formula string as its name (e.g. `=SUM(54+51)`) via `POST /api/tags` and assign it to a timesheet. When an admin exports timesheets to XLSX, `ArrayFormatter.formatValue()` joins tag names with `implode()` and returns the result unchanged. OpenSpout promotes any `=`-prefixed string to a `FormulaCell`, writing `SUM(54+51)` into the XLSX archive. Excel evaluates the formula when the file is opened.\n\n## Details\n\n### 1. `ArrayFormatter` does not sanitize before returning\n\n`sanitizeDDE()` exists on `StringHelper` and is called by `TextFormatter`, but `ArrayFormatter` never calls it.\n```php\n// src/Export/Package/CellFormatter/ArrayFormatter.php:24\nreturn implode(', ', $value);  // no sanitizeDDE() call\n```\n\n### 2. Tag name validation does not block formula trigger characters\n\nThe API blocks commas in tag names but permits `=`, `+`, `-`, and `@` - all valid formula prefixes in Excel and LibreOffice Calc.\n\n### 3. OpenSpout silently promotes strings to formula cells\n\n`Cell::fromValue(\"=SUM(54+51)\")` returns a `FormulaCell` with no warning.\n\n### PoC\n\n1. It logs in as normal user, creates tag `=SUM(54+51)`, assigns it to a timesheet.\n2","public_affected_ranges":["ECOSYSTEM: introduced 2.27.0; fixed 2.54.0"]}],"null_published_at":"2026-11-08T15:11:47.452Z","source_updated_at":"2026-05-14T20:31:09.000Z","source_disclosed_at":"2026-05-05T20:53:38.000Z","is_synthetic_fixture":false,"null_last_reviewed_at":null,"public_change_summary":"Source facts changed; compare the preserved prior revision.","null_first_observed_at":"2026-10-31T21:41:49.661Z"},{"id":"NVI-00004891","kind":"vulnerability","title":"Kimai vulnerable to formula Injection via tag names in XLSX export","revision":2,"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-3xc2-h5r3-wv3r","CVE-2026-42267"],"plain_summary":"OSV carries this publisher advisory for kimai/kimai. This is an aggregated source copy; consult the original publisher and compare update dates.","review_status":"source_listed","control_topics":[],"public_actions":[{"summary":"The original advisory lists fixed boundaries 2.54.0 for kimai/kimai. Confirm the publisher’s latest guidance.","source_ids":["sr-77c6a3ab5b6c6f0259a4019f6daf6d59"],"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":"Identify the exact component and deployed version, examine the linked publisher’s conditions, and retain evidence of any mitigation.","source_ids":["sr-2d0d9e97a248983dd19350c137596431"],"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}],"schema_version":"1.1.0","source_metrics":[{"kind":"CVSS","as_of":"2026-06-17T10:47:36.330Z","value":"5.7 MEDIUM (3.1)","meaning":"nvd@nist.gov severity; no combined Null risk score.","source_id":"sr-2d0d9e97a248983dd19350c137596431"},{"kind":"CVSS","as_of":"2026-06-17T10:47:36.330Z","value":"5.4 MEDIUM (4.0)","meaning":"security-advisories@github.com severity; no combined Null risk score.","source_id":"sr-2d0d9e97a248983dd19350c137596431"}],"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-77c6a3ab5b6c6f0259a4019f6daf6d59","url":"https://github.com/advisories/GHSA-3xc2-h5r3-wv3r","basis":"vendor_advisory","notes":"GitHub-origin advisory, CC-BY-4.0; OSV is an aggregate copy, not independent corroboration.","title":"GHSA-3xc2-h5r3-wv3r","publisher":"GitHub Advisory Database via OSV","observed_at":"2026-10-31T21:41:49.661Z"},{"id":"sr-2d0d9e97a248983dd19350c137596431","url":"https://nvd.nist.gov/vuln/detail/CVE-2026-42267","basis":"official_catalog","notes":"This product uses data from the NVD API but is not endorsed or certified by the NVD.","title":"CVE-2026-42267","publisher":"NIST National Vulnerability Database","observed_at":"2026-11-01T07:24:02.489Z"}],"affected_context":[{"certainty":"source_listed","source_ids":["sr-77c6a3ab5b6c6f0259a4019f6daf6d59"],"technology":"kimai/kimai","known_exclusions":[],"conditions_summary":"## Summary\n\nAny `ROLE_USER` can create a tag with a formula string as its name (e.g. `=SUM(54+51)`) via `POST /api/tags` and assign it to a timesheet. When an admin exports timesheets to XLSX, `ArrayFormatter.formatValue()` joins tag names with `implode()` and returns the result unchanged. OpenSpout promotes any `=`-prefixed string to a `FormulaCell`, writing `SUM(54+51)` into the XLSX archive. Excel evaluates the formula when the file is opened.\n\n## Details\n\n### 1. `ArrayFormatter` does not sanitize before returning\n\n`sanitizeDDE()` exists on `StringHelper` and is called by `TextFormatter`, but `ArrayFormatter` never calls it.\n```php\n// src/Export/Package/CellFormatter/ArrayFormatter.php:24\nreturn implode(', ', $value);  // no sanitizeDDE() call\n```\n\n### 2. Tag name validation does not block formula trigger characters\n\nThe API blocks commas in tag names but permits `=`, `+`, `-`, and `@` - all valid formula prefixes in Excel and LibreOffice Calc.\n\n### 3. OpenSpout silently promotes strings to formula cells\n\n`Cell::fromValue(\"=SUM(54+51)\")` returns a `FormulaCell` with no warning.\n\n### PoC\n\n1. It logs in as normal user, creates tag `=SUM(54+51)`, assigns it to a timesheet.\n2","public_affected_ranges":["ECOSYSTEM: introduced 2.27.0; fixed 2.54.0"]}],"null_published_at":"2026-11-01T14:34:07.608Z","source_updated_at":"2026-05-14T20:48:37.800Z","source_disclosed_at":"2026-05-05T20:53:38.000Z","is_synthetic_fixture":false,"null_last_reviewed_at":null,"public_change_summary":"Source facts changed; compare the preserved prior revision.","null_first_observed_at":"2026-10-31T21:41:49.661Z"},{"id":"NVI-00004891","kind":"vulnerability","title":"Kimai vulnerable to formula Injection via tag names in XLSX export","revision":1,"unknowns":["Customer inventory, deployment, reachability and exploitation have not been inspected."],"lifecycle":"active","identifiers":["GHSA-3xc2-h5r3-wv3r","CVE-2026-42267"],"plain_summary":"OSV carries this publisher advisory for kimai/kimai. This is an aggregated source copy; consult the original publisher and compare update dates.","review_status":"source_listed","control_topics":[],"public_actions":[{"summary":"The original advisory lists fixed boundaries 2.54.0 for kimai/kimai. Confirm the publisher’s latest guidance.","source_ids":["sr-77c6a3ab5b6c6f0259a4019f6daf6d59"],"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":[],"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-77c6a3ab5b6c6f0259a4019f6daf6d59","url":"https://github.com/advisories/GHSA-3xc2-h5r3-wv3r","basis":"vendor_advisory","notes":"GitHub-origin advisory, CC-BY-4.0; OSV is an aggregate copy, not independent corroboration.","title":"GHSA-3xc2-h5r3-wv3r","publisher":"GitHub Advisory Database via OSV","observed_at":"2026-10-31T21:41:49.661Z"}],"affected_context":[{"certainty":"source_listed","source_ids":["sr-77c6a3ab5b6c6f0259a4019f6daf6d59"],"technology":"kimai/kimai","known_exclusions":[],"conditions_summary":"## Summary\n\nAny `ROLE_USER` can create a tag with a formula string as its name (e.g. `=SUM(54+51)`) via `POST /api/tags` and assign it to a timesheet. When an admin exports timesheets to XLSX, `ArrayFormatter.formatValue()` joins tag names with `implode()` and returns the result unchanged. OpenSpout promotes any `=`-prefixed string to a `FormulaCell`, writing `SUM(54+51)` into the XLSX archive. Excel evaluates the formula when the file is opened.\n\n## Details\n\n### 1. `ArrayFormatter` does not sanitize before returning\n\n`sanitizeDDE()` exists on `StringHelper` and is called by `TextFormatter`, but `ArrayFormatter` never calls it.\n```php\n// src/Export/Package/CellFormatter/ArrayFormatter.php:24\nreturn implode(', ', $value);  // no sanitizeDDE() call\n```\n\n### 2. Tag name validation does not block formula trigger characters\n\nThe API blocks commas in tag names but permits `=`, `+`, `-`, and `@` - all valid formula prefixes in Excel and LibreOffice Calc.\n\n### 3. OpenSpout silently promotes strings to formula cells\n\n`Cell::fromValue(\"=SUM(54+51)\")` returns a `FormulaCell` with no warning.\n\n### PoC\n\n1. It logs in as normal user, creates tag `=SUM(54+51)`, assigns it to a timesheet.\n2","public_affected_ranges":["ECOSYSTEM: introduced 2.27.0; fixed 2.54.0"]}],"null_published_at":"2026-10-31T22:12:57.146Z","source_updated_at":"2026-05-14T20:48:37.800Z","source_disclosed_at":"2026-05-05T20:53:38.000Z","is_synthetic_fixture":false,"null_last_reviewed_at":null,"public_change_summary":"First indexed by Null; source disclosure date is shown separately.","null_first_observed_at":"2026-10-31T21:41:49.661Z"}],"next_cursor":null,"snapshot_revision":"42594"}