CVE-2026-112901

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 v3 7.5 HIGH

7.5^/10

CVSS v3 : HIGH

Vector :

Exploitability : 3.9 / Impact : 3.6

Attack Vector NETWORK

Attack Complexity LOW

Privileges Required NONE

User Interaction NONE

Confidentiality Impact NONE

Integrity Impact NONE

Availability Impact HIGH

Scope UNCHANGED

References

Link	Resource
https://github.com/python-pillow/Pillow/commit/2852a3e3d568997ddec745fc800991f138878f4b	Patch
https://github.com/python-pillow/Pillow/releases/tag/13.0.0	Release Notes
https://github.com/python-pillow/Pillow/security/advisories/GHSA-xgh8-jp6q-p5x8	Exploit Mitigation Patch Vendor Advisory

Configurations

Configuration 1 (hide)

cpe:2.3:a:python:pillow:*:*:*:*:*:*:*:*

History

27 Oct 2026, 14:54

Type	Values Removed	Values Added
CVSS	v2 : ~~unknown~~ v3 : ~~unknown~~	v2 : unknown v3 : 7.5
CPE		cpe:2.3:a:python:pillow::::::::
First Time		Python Python pillow
References	~~() https://github.com/python-pillow/Pillow/commit/2852a3e3d568997ddec745fc800991f138878f4b -~~	() https://github.com/python-pillow/Pillow/commit/2852a3e3d568997ddec745fc800991f138878f4b - Patch
References	~~() https://github.com/python-pillow/Pillow/releases/tag/13.0.0 -~~	() https://github.com/python-pillow/Pillow/releases/tag/13.0.0 - Release Notes
References	~~() https://github.com/python-pillow/Pillow/security/advisories/GHSA-xgh8-jp6q-p5x8 -~~	() https://github.com/python-pillow/Pillow/security/advisories/GHSA-xgh8-jp6q-p5x8 - Exploit, Mitigation, Patch, Vendor Advisory

19 Oct 2026, 22:17

Type	Values Removed	Values Added
New CVE

Information

Published : 2026-10-19 22:17

Updated : 2026-10-27 14:54

NVD link : CVE-2026-112901

Mitre link : CVE-2026-112901

CVE.ORG link : CVE-2026-112901

JSON object : View

Products Affected

python

pillow

CWE

CWE-1333

Inefficient Regular Expression Complexity

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