{"id":"CVE-2026-107219","summary":"Excelize: Unbounded spinCount in agile decryption burns CPU during OpenFile","details":"Excelize is a Go language library for reading and writing Microsoft Excel spreadsheets. From 2.3.1 to 2.11.0, agile decryption accepts an attacker-controlled spinCount and performs that many password-key derivation iterations before verifier validation. OpenFile reaches agileDecrypt, which passes the unbounded spinCount to convertPasswdToKey before password verification. When a crafted OLE encrypted-workbook header supplies an excessive spinCount and the file is opened, the key-derivation loop performs unbounded attacker-selected work and cannot be cancelled, allowing an attacker to consume a CPU core for an attacker-controlled duration. No fixed version is available as of this review.","aliases":["GHSA-jrfj-fhj2-jjvm"],"modified":"2026-10-08T10:45:22.934717190Z","published":"2026-10-07T18:33:34.460Z","database_specific":{"cna_assigner":"GitHub_M","cwe_ids":["CWE-400"],"osv_generated_from":"https://github.com/CVEProject/cvelistV5/tree/main/cves/2026/107xxx/CVE-2026-107219.json"},"references":[{"type":"ADVISORY","url":"https://github.com/CVEProject/cvelistV5/tree/main/cves/2026/107xxx/CVE-2026-107219.json"},{"type":"FIX","url":"https://github.com/qax-os/excelize/commit/2badfcd5841d0d88b0ffea119f5a2f3c53b4910b"},{"type":"FIX","url":"https://github.com/qax-os/excelize/pull/2389"},{"type":"ADVISORY","url":"https://github.com/qax-os/excelize/security/advisories/GHSA-jrfj-fhj2-jjvm"},{"type":"ADVISORY","url":"https://nvd.nist.gov/vuln/detail/CVE-2026-107219"}],"affected":[{"ranges":[{"type":"GIT","repo":"https://github.com/qax-os/excelize","events":[{"introduced":"89465f41b5a29ac2e1debe16b8cb6f59c344f917"},{"last_affected":"90ff348959dd842cbf3a4fbd93a78afbe18db476"}],"database_specific":{"extracted_events":[{"introduced":"2.3.1"},{"last_affected":"2.11.0"}],"source":"AFFECTED_FIELD"}}],"versions":["v2.11.0","v2.10.1","v2.10.0","v2.9.1","v2.9.0","v2.8.1","v2.8.0","v2.7.1","v2.7.0","v2.6.1","v2.6.0","v2.5.0","v2.4.1","v2.4.0","v2.3.2","v2.3.1"],"database_specific":{"source":"https://storage.googleapis.com/cve-osv-conversion/osv-output/CVE-2026-107219.json"}}],"schema_version":"1.9.0","severity":[{"type":"CVSS_V3","score":"CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H"}]}