{"dataType": "CVE_RECORD", "dataVersion": "5.2", "cveMetadata": {"cveId": "CVE-2026-107215", "assignerOrgId": "a0819718-46f1-4df5-94e2-005712e83aaa", "state": "PUBLISHED", "assignerShortName": "GitHub_M", "dateReserved": "2026-10-07T14:34:14.815Z", "datePublished": "2026-10-07T17:48:03.233Z", "dateUpdated": "2026-10-07T17:48:03.233Z"}, "containers": {"cna": {"title": "Excelize: extractPart allocates attacker-controlled, unbounded and negative-sized buffers from CFB directory entries: remote panic / OOM DoS", "problemTypes": [{"descriptions": [{"cweId": "CWE-789", "lang": "en", "description": "CWE-789: Memory Allocation with Excessive Size Value", "type": "CWE"}]}], "metrics": [{"cvssV3_1": {"attackComplexity": "LOW", "attackVector": "NETWORK", "availabilityImpact": "HIGH", "baseScore": 7.5, "baseSeverity": "HIGH", "confidentialityImpact": "NONE", "integrityImpact": "NONE", "privilegesRequired": "NONE", "scope": "UNCHANGED", "userInteraction": "NONE", "vectorString": "CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H", "version": "3.1"}}], "references": [{"name": "https://github.com/qax-os/excelize/security/advisories/GHSA-x2q3-8cjh-766f", "tags": ["x_refsource_CONFIRM"], "url": "https://github.com/qax-os/excelize/security/advisories/GHSA-x2q3-8cjh-766f"}, {"name": "https://github.com/qax-os/excelize/pull/2396", "tags": ["x_refsource_MISC"], "url": "https://github.com/qax-os/excelize/pull/2396"}, {"name": "https://github.com/qax-os/excelize/commit/5f636f9dcde55911f14290060b017f0cc88cd694", "tags": ["x_refsource_MISC"], "url": "https://github.com/qax-os/excelize/commit/5f636f9dcde55911f14290060b017f0cc88cd694"}], "affected": [{"vendor": "qax-os", "product": "excelize", "versions": [{"version": ">= 2.3.1, <= 2.11.0", "status": "affected"}]}], "providerMetadata": {"orgId": "a0819718-46f1-4df5-94e2-005712e83aaa", "shortName": "GitHub_M", "dateUpdated": "2026-10-07T17:48:03.233Z"}, "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."}], "source": {"advisory": "GHSA-x2q3-8cjh-766f", "discovery": "UNKNOWN"}}}}

{}

{"affected": [{"affectedData": [{"product": "excelize", "vendor": "qax-os", "versions": [{"status": "affected", "version": ">= 2.3.1, <= 2.11.0"}]}], "source": "security-advisories@github.com"}], "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."}], "id": "CVE-2026-107215", "lastModified": "2026-10-07T18:17:19.213", "metrics": {"cvssMetricV31": [{"cvssData": {"attackComplexity": "LOW", "attackVector": "NETWORK", "availabilityImpact": "HIGH", "baseScore": 7.5, "baseSeverity": "HIGH", "confidentialityImpact": "NONE", "integrityImpact": "NONE", "privilegesRequired": "NONE", "scope": "UNCHANGED", "userInteraction": "NONE", "vectorString": "CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H", "version": "3.1"}, "exploitabilityScore": 3.9, "impactScore": 3.6, "source": "security-advisories@github.com", "type": "Secondary"}]}, "published": "2026-10-07T18:17:19.213", "references": [{"source": "security-advisories@github.com", "url": "https://github.com/qax-os/excelize/commit/5f636f9dcde55911f14290060b017f0cc88cd694"}, {"source": "security-advisories@github.com", "url": "https://github.com/qax-os/excelize/pull/2396"}, {"source": "security-advisories@github.com", "url": "https://github.com/qax-os/excelize/security/advisories/GHSA-x2q3-8cjh-766f"}], "sourceIdentifier": "security-advisories@github.com", "vulnStatus": "Received", "weaknesses": [{"description": [{"lang": "en", "value": "CWE-789"}], "source": "security-advisories@github.com", "type": "Primary"}]}

{}

{"created": "2026-10-07T19:30:03.159467+00:00", "updated": "2026-10-07T19:30:03.159473+00:00", "vendors": []}