{"id":"CVE-2026-112901","title":"Pillow: ReDoS in XbmImagePlugin: 512-byte file stalls Image.open() for minutes","summary":"Pillow is a Python imaging library. Prior to 13.0.0, Pillow's XBM header parser is vulnerable to regular-expression denial of service. In XbmImageFile._open, when an application calls Image.open() on a small crafted XBM file, XbmImagePlu…","severity":"medium","cvss":6.9,"cvssVector":"CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:N/VI:N/VA:L/SC:N/SI:N/SA:N","cvssSource":"cna","cwe":["CWE-1333"],"vendor":"python-pillow","product":"Pillow","affected":["Pillow < 13.0.0"],"published":"2026-10-19","updated":"2026-10-19","sourceUpdated":"2026-10-19T22:09:52.614Z","source":"CVEORG","sourceUrl":"https://www.cve.org/CVERecord?id=CVE-2026-112901","references":[{"url":"https://github.com/python-pillow/Pillow/security/advisories/GHSA-xgh8-jp6q-p5x8","label":"https://github.com/python-pillow/Pillow/security/advisories/GHSA-xgh8-jp6q-p5x8"},{"url":"https://github.com/python-pillow/Pillow/commit/2852a3e3d568997ddec745fc800991f138878f4b","label":"https://github.com/python-pillow/Pillow/commit/2852a3e3d568997ddec745fc800991f138878f4b"},{"url":"https://github.com/python-pillow/Pillow/releases/tag/13.0.0","label":"https://github.com/python-pillow/Pillow/releases/tag/13.0.0"}],"tags":["cve.org"],"ingestedAt":"2026-10-19T22:46:42.319Z","slug":"CVE-2026-112901","body":"## Overview\n\nPillow is a Python imaging library. Prior to 13.0.0, Pillow's XBM header parser is vulnerable to regular-expression denial of service. In XbmImageFile._open, when an application calls Image.open() on a small crafted XBM file, XbmImagePlugin applies a backtracking expression to the attacker-controlled header before image dimensions are accepted, stalling a worker for minutes and denying service. This issue is fixed in version 13.0.0.\n\n## Affected\n\n- `Pillow < 13.0.0`\n\n## Remediation\n\nRefer to the linked advisories for vendor-supplied fixes and affected version ranges.","depth":"sunlit","depthScore":38,"depthScoreParts":{"impact":38,"likelihood":0,"exploitation":0,"ransomware":0},"changes":[]}