{"id":"CVE-2026-107215","sourceIdentifier":"security-advisories@github.com","published":"2026-10-07T18:17:19.213","lastModified":"2026-10-13T14:23:50.540","vulnStatus":"Analyzed","cveTags":[],"descriptions":[{"lang":"en","value":"Excelize is a Go language library for reading and writing Microsoft Excel spreadsheets. From 2.3.1 to 2.11.0, extractPart allocates a byte slice directly from an attacker-controlled CFB directory-entry size before validating the sector chain or size domain. extractPart trusts the CFB directory entry streamSize for EncryptionInfo and EncryptedPackage allocations before validating the stream. When a crafted OLE compound file declares a negative or extremely large EncryptionInfo or EncryptedPackage stream size, the declared size reaches make with a negative length or forces a multi-gigabyte allocation, allowing an attacker to panic or exhaust process memory. No fixed version is available as of this review."}],"affected":[{"source":"security-advisories@github.com","affectedData":[{"vendor":"qax-os","product":"excelize","versions":[{"version":">= 2.3.1, <= 2.11.0","status":"affected"}]}]}],"metrics":{"cvssMetricV31":[{"source":"security-advisories@github.com","type":"Secondary","cvssData":{"version":"3.1","vectorString":"CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H","baseScore":7.5,"baseSeverity":"HIGH","attackVector":"NETWORK","attackComplexity":"LOW","privilegesRequired":"NONE","userInteraction":"NONE","scope":"UNCHANGED","confidentialityImpact":"NONE","integrityImpact":"NONE","availabilityImpact":"HIGH"},"exploitabilityScore":3.9,"impactScore":3.6}],"ssvcV203":[{"source":"134c704f-9b21-4f2e-91b3-4a467353bcc0","ssvcData":{"timestamp":"2026-10-10T02:38:08.709822Z","id":"CVE-2026-107215","options":[{"exploitation":"poc"},{"automatable":"yes"},{"technicalImpact":"partial"}],"role":"CISA Coordinator","version":"2.0.3"}}]},"weaknesses":[{"source":"security-advisories@github.com","type":"Secondary","description":[{"lang":"en","value":"CWE-789"}]}],"configurations":[{"nodes":[{"operator":"OR","negate":false,"cpeMatch":[{"vulnerable":true,"criteria":"cpe:2.3:a:excelize:excelize:*:*:*:*:*:go:*:*","versionStartIncluding":"2.3.1","versionEndIncluding":"2.11.0","matchCriteriaId":"E410B3A2-C410-4848-A0E9-EB6DC585F1D3"}]}]}],"references":[{"url":"https://github.com/qax-os/excelize/commit/5f636f9dcde55911f14290060b017f0cc88cd694","source":"security-advisories@github.com","tags":["Patch"]},{"url":"https://github.com/qax-os/excelize/pull/2396","source":"security-advisories@github.com","tags":["Issue Tracking","Patch"]},{"url":"https://github.com/qax-os/excelize/security/advisories/GHSA-x2q3-8cjh-766f","source":"security-advisories@github.com","tags":["Exploit","Vendor Advisory"]},{"url":"https://github.com/qax-os/excelize/security/advisories/GHSA-x2q3-8cjh-766f","source":"134c704f-9b21-4f2e-91b3-4a467353bcc0","tags":["Exploit","Vendor Advisory"]}]}