{"id":"BIT-pillow-2026-112901","summary":"Pillow: ReDoS in XbmImagePlugin: 512-byte file stalls Image.open() for minutes","details":"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, 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.","aliases":["CVE-2026-112901","GHSA-xgh8-jp6q-p5x8"],"modified":"2026-10-26T08:56:08.965718404Z","published":"2026-10-26T05:56:02.790Z","database_specific":{"cpes":["cpe:2.3:a:python:pillow:*:*:*:*:*:python:*:*"],"severity":"Medium"},"references":[{"type":"WEB","url":"https://github.com/python-pillow/Pillow/commit/2852a3e3d568997ddec745fc800991f138878f4b"},{"type":"WEB","url":"https://github.com/python-pillow/Pillow/releases/tag/13.0.0"},{"type":"WEB","url":"https://github.com/python-pillow/Pillow/security/advisories/GHSA-xgh8-jp6q-p5x8"},{"type":"WEB","url":"https://nvd.nist.gov/vuln/detail/CVE-2026-112901"}],"affected":[{"package":{"name":"pillow","ecosystem":"Bitnami","purl":"pkg:bitnami/pillow"},"ranges":[{"type":"SEMVER","events":[{"introduced":"0"},{"fixed":"13.0.0"}]}],"database_specific":{"source":"https://github.com/bitnami/vulndb/tree/main/data/pillow/BIT-pillow-2026-112901.json"},"severity":[{"type":"CVSS_V4","score":"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/E:X/CR:X/IR:X/AR:X/MAV:X/MAC:X/MAT:X/MPR:X/MUI:X/MVC:X/MVI:X/MVA:X/MSC:X/MSI:X/MSA:X/S:X/AU:X/R:X/V:X/RE:X/U:X"}]}],"schema_version":"1.9.0"}