CVE-2026-112901
highPillow is a Python imaging library.
Vendor / product: Python — pillow
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.
CVSS
7.5
7.5 (CVSS v3.1)
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H Severity source: NVD CVSS v3.1 (nvd@nist.gov)
Timeline (UTC)
Published: 2026-10-19 22:17
Modified: 2026-10-27 14:54
NVD status: Analyzed
Last synced 17 hours ago
Verified against the source API 2026-10-28 11:30 UTC
Exploitation
Not listed in CISA KEV (as of last catalog sync)
Absence from KEV does not mean a CVE is not exploited. Exploitation status: unknown (no authoritative evidence in our sources).
Affected products
python / pillow <13.0.0
Weakness classification (CWE)
Source: NVD / CISA. “NVD-CWE-Other” and “NVD-CWE-noinfo” mean NVD could not assign a specific weakness.
Mitigation & advisories
Patch / mitigation: https://github.com/python-pillow/Pillow/commit/2852a3e3d568997ddec745fc800991f138878f4b
Patch / mitigation: https://github.com/python-pillow/Pillow/security/advisories/GHSA-xgh8-jp6q-p5x8
References
- https://github.com/python-pillow/Pillow/commit/2852a3e3d568997ddec745fc800991f138878f4b security-advisories@github.com
- https://github.com/python-pillow/Pillow/releases/tag/13.0.0 security-advisories@github.com
- https://github.com/python-pillow/Pillow/security/advisories/GHSA-xgh8-jp6q-p5x8 security-advisories@github.com
Data sources
NVD CVE API 2.0 — fetched 2026-10-28 11:30 UTC · record ↗