{"dataType": "CVE_RECORD", "dataVersion": "5.2", "cveMetadata": {"cveId": "CVE-2026-96641", "assignerOrgId": "a0819718-46f1-4df5-94e2-005712e83aaa", "state": "PUBLISHED", "assignerShortName": "GitHub_M", "dateReserved": "2026-09-23T14:35:50.130Z", "datePublished": "2026-10-21T20:51:24.388Z", "dateUpdated": "2026-10-21T20:51:24.388Z"}, "containers": {"cna": {"title": "Pillow: Reachable undefined behavior in native integer operations, potentially leading to denial of service or logic integrity compromise", "problemTypes": [{"descriptions": [{"cweId": "CWE-190", "lang": "en", "description": "CWE-190: Integer Overflow or Wraparound", "type": "CWE"}]}], "metrics": [{"cvssV3_1": {"attackComplexity": "LOW", "attackVector": "NETWORK", "availabilityImpact": "HIGH", "baseScore": 6.5, "baseSeverity": "MEDIUM", "confidentialityImpact": "NONE", "integrityImpact": "NONE", "privilegesRequired": "NONE", "scope": "UNCHANGED", "userInteraction": "REQUIRED", "vectorString": "CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:N/I:N/A:H", "version": "3.1"}}], "references": [{"name": "https://github.com/python-pillow/Pillow/security/advisories/GHSA-4rm8-3hmm-39fg", "tags": ["x_refsource_CONFIRM"], "url": "https://github.com/python-pillow/Pillow/security/advisories/GHSA-4rm8-3hmm-39fg"}, {"name": "https://github.com/python-pillow/Pillow/pull/10010", "tags": ["x_refsource_MISC"], "url": "https://github.com/python-pillow/Pillow/pull/10010"}, {"name": "https://github.com/python-pillow/Pillow/commit/80de4be9e38d3a6148dd4d8491eb80cd12b760a4", "tags": ["x_refsource_MISC"], "url": "https://github.com/python-pillow/Pillow/commit/80de4be9e38d3a6148dd4d8491eb80cd12b760a4"}, {"name": "https://github.com/python-pillow/Pillow/releases/tag/13.0.0", "tags": ["x_refsource_MISC"], "url": "https://github.com/python-pillow/Pillow/releases/tag/13.0.0"}], "affected": [{"vendor": "python-pillow", "product": "Pillow", "versions": [{"version": "< 13.0.0", "status": "affected"}]}], "providerMetadata": {"orgId": "a0819718-46f1-4df5-94e2-005712e83aaa", "shortName": "GitHub_M", "dateUpdated": "2026-10-21T20:51:24.388Z"}, "descriptions": [{"lang": "en", "value": "Pillow is a Python imaging library. Prior to 13.0.0, PILfont text-width accumulation in src/_imaging.c checks positive glyph advances against INT_MAX but does not check negative advances against INT_MIN. Repeating a signed 16-bit advance of -32768 can therefore execute a signed C integer overflow in xsize += dx, producing a large positive width from a negative mathematical result. Applications that use getlength(), getsize(), or derived layout, quota, serialization, or allocation calculations can experience logic-integrity errors or resource consumption, while the high-level mask path commonly retains a decompression-bomb check. This issue is fixed in version 13.0.0."}], "source": {"advisory": "GHSA-4rm8-3hmm-39fg", "discovery": "UNKNOWN"}}}}

{}

{"affected": [{"affectedData": [{"product": "Pillow", "vendor": "python-pillow", "versions": [{"status": "affected", "version": "< 13.0.0"}]}], "source": "security-advisories@github.com"}], "cveTags": [], "descriptions": [{"lang": "en", "value": "Pillow is a Python imaging library. Prior to 13.0.0, PILfont text-width accumulation in src/_imaging.c checks positive glyph advances against INT_MAX but does not check negative advances against INT_MIN. Repeating a signed 16-bit advance of -32768 can therefore execute a signed C integer overflow in xsize += dx, producing a large positive width from a negative mathematical result. Applications that use getlength(), getsize(), or derived layout, quota, serialization, or allocation calculations can experience logic-integrity errors or resource consumption, while the high-level mask path commonly retains a decompression-bomb check. This issue is fixed in version 13.0.0."}], "id": "CVE-2026-96641", "lastModified": "2026-10-21T21:20:32.500", "metrics": {"cvssMetricV31": [{"cvssData": {"attackComplexity": "LOW", "attackVector": "NETWORK", "availabilityImpact": "HIGH", "baseScore": 6.5, "baseSeverity": "MEDIUM", "confidentialityImpact": "NONE", "integrityImpact": "NONE", "privilegesRequired": "NONE", "scope": "UNCHANGED", "userInteraction": "REQUIRED", "vectorString": "CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:N/I:N/A:H", "version": "3.1"}, "exploitabilityScore": 2.8, "impactScore": 3.6, "source": "security-advisories@github.com", "type": "Secondary"}]}, "published": "2026-10-21T21:20:32.500", "references": [{"source": "security-advisories@github.com", "url": "https://github.com/python-pillow/Pillow/commit/80de4be9e38d3a6148dd4d8491eb80cd12b760a4"}, {"source": "security-advisories@github.com", "url": "https://github.com/python-pillow/Pillow/pull/10010"}, {"source": "security-advisories@github.com", "url": "https://github.com/python-pillow/Pillow/releases/tag/13.0.0"}, {"source": "security-advisories@github.com", "url": "https://github.com/python-pillow/Pillow/security/advisories/GHSA-4rm8-3hmm-39fg"}], "sourceIdentifier": "security-advisories@github.com", "vulnStatus": "Received", "weaknesses": [{"description": [{"lang": "en", "value": "CWE-190"}], "source": "security-advisories@github.com", "type": "Primary"}]}

{}

{}