CVE-2026-112891

Pillow is a Python imaging library. From 9.2.0 until 13.0.0, Pillow performs quadratic copying when saving a GIF with a long comment. _get_global_header() repeatedly copies portions of comment data while assembling the global header, including comments retained from an untrusted input image. An attacker can supply an image with a large GIF comment to an application that saves it as GIF. This can consume excessive CPU and delay or deny 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/68a3fe957d8a4d552e8c69d96066d749f0614c7e	Patch
https://github.com/python-pillow/Pillow/releases/tag/13.0.0	Release Notes
https://github.com/python-pillow/Pillow/security/advisories/GHSA-fc9g-5qg7-mf45	Vendor Advisory

Configurations

Configuration 1 (hide)

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

History

27 Oct 2026, 14:59

Type	Values Removed	Values Added
First Time		Python Python pillow
CPE		cpe:2.3:a:python:pillow::::::::
CVSS	v2 : ~~unknown~~ v3 : ~~unknown~~	v2 : unknown v3 : 7.5
References	~~() https://github.com/python-pillow/Pillow/commit/68a3fe957d8a4d552e8c69d96066d749f0614c7e -~~	() https://github.com/python-pillow/Pillow/commit/68a3fe957d8a4d552e8c69d96066d749f0614c7e - 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-fc9g-5qg7-mf45 -~~	() https://github.com/python-pillow/Pillow/security/advisories/GHSA-fc9g-5qg7-mf45 - 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 14:59

NVD link : CVE-2026-112891

Mitre link : CVE-2026-112891

CVE.ORG link : CVE-2026-112891

JSON object : View

Products Affected

python

pillow

CWE

CWE-407

Inefficient Algorithmic Complexity

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