{"items":[{"id":"NVI-00011740","kind":"vulnerability","title":"Excelize: Unbounded spinCount in agile decryption burns CPU during OpenFile","revision":2,"unknowns":["Customer inventory, deployment, reachability and exploitation have not been inspected."],"lifecycle":"active","identifiers":["GHSA-jrfj-fhj2-jjvm","CVE-2026-107219"],"plain_summary":"GitHub lists this reviewed advisory for github.com/xuri/excelize/v2. 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-23ca0455680f977fd0918a76faf190d3"],"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":"2026-10-07T20:23:23.000Z","value":"7.5 high","meaning":"GitHub source severity; exploitability and local consequence require separate evidence.","source_id":"sr-122ed84e741150dfd7076e06a8547670"},{"kind":"EPSS","as_of":"2026-10-31T12:00:27.000Z","value":"0.363%","meaning":"FIRST EPSS model v2026.06.15; exploitation probability over 30 days, percentile 0.30113. Missing scores are unknown.","source_id":"sr-23ca0455680f977fd0918a76faf190d3"}],"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-122ed84e741150dfd7076e06a8547670","url":"https://github.com/advisories/GHSA-jrfj-fhj2-jjvm","basis":"vendor_advisory","notes":"GitHub Advisory Database; CC-BY-4.0. Each advisory links its original attribution. Null normalizes fields.","title":"GHSA-jrfj-fhj2-jjvm","publisher":"GitHub Advisory Database","observed_at":"2026-11-01T00:58:46.232Z"},{"id":"sr-23ca0455680f977fd0918a76faf190d3","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-2026-107219","publisher":"FIRST EPSS","observed_at":"2026-11-01T01:39:43.065Z"}],"affected_context":[{"certainty":"source_listed","source_ids":["sr-122ed84e741150dfd7076e06a8547670"],"technology":"github.com/xuri/excelize/v2","known_exclusions":[],"conditions_summary":"Opening a file whose first eight bytes are the OLE magic number sends excelize down the decryption path whether or not the caller set a password, or supports encrypted workbooks at all. `openReaderAt` (excelize.go:198-215) branches on the header alone, and `agileDecrypt` calls `convertPasswdToKey` before the verifier hash is checked, so the key-derivation loop runs `spinCount` times regardless.\n\n`spinCount` (crypt.go:98) is a plain `int` filled by a bare `xml.Unmarshal` of the file's own EncryptionInfo stream. Nothing bounds it.\n\nA 3072-byte file with spinCount 100000000 makes `OpenFile` take 58.65s on v2.11.0 with default options, then return `zip: not a valid zip file`. It is linear at about 0.6 microseconds per iteration and the attacker picks the number, so 1e9 is roughly ten minutes. Nothing on the path takes a `context.Context`, so the caller cannot cancel it; in an HTTP handler the write timeout returns a response while the goroutine keeps spinning. Memory stays flat at 24 MB, so nothing reclaims it either.\n\n```\nv2.5.0   spinCount=10000000   5.307s\nv2.9.1   spinCount=10000000   5.444s\nv2.11.0  spinCount=10000000   7.529s\nv2.11.0  spinCount=100000000  58.654s\n```\n\nThe loop ar","public_affected_ranges":[">= 2.3.1, < 2.11.1-0.20260906004932-2badfcd5841d"]}],"null_published_at":"2026-11-01T14:34:14.104Z","source_updated_at":"2026-10-07T20:23:23.000Z","source_disclosed_at":"2026-10-07T20:23:22.000Z","is_synthetic_fixture":false,"null_last_reviewed_at":null,"public_change_summary":"Dated EPSS estimate updated; this is not a new disclosure or proof of exploitation.","null_first_observed_at":"2026-11-01T00:58:46.232Z"},{"id":"NVI-00011740","kind":"vulnerability","title":"Excelize: Unbounded spinCount in agile decryption burns CPU during OpenFile","revision":1,"unknowns":["Customer inventory, deployment, reachability and exploitation have not been inspected."],"lifecycle":"active","identifiers":["GHSA-jrfj-fhj2-jjvm","CVE-2026-107219"],"plain_summary":"GitHub lists this reviewed advisory for github.com/xuri/excelize/v2. 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-122ed84e741150dfd7076e06a8547670"],"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":"2026-10-07T20:23:23.000Z","value":"7.5 high","meaning":"GitHub source severity; exploitability and local consequence require separate evidence.","source_id":"sr-122ed84e741150dfd7076e06a8547670"}],"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-122ed84e741150dfd7076e06a8547670","url":"https://github.com/advisories/GHSA-jrfj-fhj2-jjvm","basis":"vendor_advisory","notes":"GitHub Advisory Database; CC-BY-4.0. Each advisory links its original attribution. Null normalizes fields.","title":"GHSA-jrfj-fhj2-jjvm","publisher":"GitHub Advisory Database","observed_at":"2026-11-01T00:58:46.232Z"}],"affected_context":[{"certainty":"source_listed","source_ids":["sr-122ed84e741150dfd7076e06a8547670"],"technology":"github.com/xuri/excelize/v2","known_exclusions":[],"conditions_summary":"Opening a file whose first eight bytes are the OLE magic number sends excelize down the decryption path whether or not the caller set a password, or supports encrypted workbooks at all. `openReaderAt` (excelize.go:198-215) branches on the header alone, and `agileDecrypt` calls `convertPasswdToKey` before the verifier hash is checked, so the key-derivation loop runs `spinCount` times regardless.\n\n`spinCount` (crypt.go:98) is a plain `int` filled by a bare `xml.Unmarshal` of the file's own EncryptionInfo stream. Nothing bounds it.\n\nA 3072-byte file with spinCount 100000000 makes `OpenFile` take 58.65s on v2.11.0 with default options, then return `zip: not a valid zip file`. It is linear at about 0.6 microseconds per iteration and the attacker picks the number, so 1e9 is roughly ten minutes. Nothing on the path takes a `context.Context`, so the caller cannot cancel it; in an HTTP handler the write timeout returns a response while the goroutine keeps spinning. Memory stays flat at 24 MB, so nothing reclaims it either.\n\n```\nv2.5.0   spinCount=10000000   5.307s\nv2.9.1   spinCount=10000000   5.444s\nv2.11.0  spinCount=10000000   7.529s\nv2.11.0  spinCount=100000000  58.654s\n```\n\nThe loop ar","public_affected_ranges":[">= 2.3.1, < 2.11.1-0.20260906004932-2badfcd5841d"]}],"null_published_at":"2026-11-01T01:03:56.596Z","source_updated_at":"2026-10-07T20:23:23.000Z","source_disclosed_at":"2026-10-07T20:23:22.000Z","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":"2026-11-01T00:58:46.232Z"}],"next_cursor":null,"snapshot_revision":"42594"}