CVE-2026-96641

{"id": "CVE-2026-96641", "cveTags": [], "metrics": {"ssvcV203": [{"source": "134c704f-9b21-4f2e-91b3-4a467353bcc0", "ssvcData": {"id": "CVE-2026-96641", "role": "CISA Coordinator", "options": [{"exploitation": "poc"}, {"automatable": "no"}, {"technicalImpact": "partial"}], "version": "2.0.3", "timestamp": "2026-10-28T01:50:02.182605Z"}}], "cvssMetricV31": [{"type": "Secondary", "source": "security-advisories@github.com", "cvssData": {"scope": "UNCHANGED", "version": "3.1", "baseScore": 6.5, "attackVector": "NETWORK", "baseSeverity": "MEDIUM", "vectorString": "CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:N/I:N/A:H", "integrityImpact": "NONE", "userInteraction": "REQUIRED", "attackComplexity": "LOW", "availabilityImpact": "HIGH", "privilegesRequired": "NONE", "confidentialityImpact": "NONE"}, "impactScore": 3.6, "exploitabilityScore": 2.8}]}, "affected": [{"source": "security-advisories@github.com", "affectedData": [{"vendor": "python-pillow", "product": "Pillow", "versions": [{"status": "affected", "version": "< 13.0.0"}]}]}], "published": "2026-10-21T21:20:32.500", "references": [{"url": "https://github.com/python-pillow/Pillow/commit/80de4be9e38d3a6148dd4d8491eb80cd12b760a4", "tags": ["Patch"], "source": "security-advisories@github.com"}, {"url": "https://github.com/python-pillow/Pillow/pull/10010", "tags": ["Issue Tracking"], "source": "security-advisories@github.com"}, {"url": "https://github.com/python-pillow/Pillow/releases/tag/13.0.0", "tags": ["Release Notes"], "source": "security-advisories@github.com"}, {"url": "https://github.com/python-pillow/Pillow/security/advisories/GHSA-4rm8-3hmm-39fg", "tags": ["Vendor Advisory"], "source": "security-advisories@github.com"}], "vulnStatus": "Analyzed", "weaknesses": [{"type": "Secondary", "source": "security-advisories@github.com", "description": [{"lang": "en", "value": "CWE-190"}]}], "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."}], "lastModified": "2026-10-28T02:17:08.123", "configurations": [{"nodes": [{"negate": false, "cpeMatch": [{"criteria": "cpe:2.3:a:python:pillow:*:*:*:*:*:*:*:*", "vulnerable": true, "matchCriteriaId": "EB9056BC-A940-47D5-957B-7BA438FA0D58", "versionEndExcluding": "13.0.0"}], "operator": "OR"}]}], "sourceIdentifier": "security-advisories@github.com"}