{"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": "2026-10-10T02:38:31.276Z"}, "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"}}, "adp": [{"references": [{"url": "https://github.com/qax-os/excelize/security/advisories/GHSA-x2q3-8cjh-766f", "tags": ["exploit"]}], "metrics": [{"other": {"type": "ssvc", "content": {"timestamp": "2026-10-10T02:38:08.709822Z", "id": "CVE-2026-107215", "options": [{"Exploitation": "poc"}, {"Automatable": "yes"}, {"Technical Impact": "partial"}], "role": "CISA Coordinator", "version": "2.0.3"}}}], "title": "CISA ADP Vulnrichment", "providerMetadata": {"orgId": "134c704f-9b21-4f2e-91b3-4a467353bcc0", "shortName": "CISA-ADP", "dateUpdated": "2026-10-10T02:38:31.276Z"}}]}}

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