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CVE-2026-112401 Details

Description

Pillow is a Python imaging library. From 5.4.0 until 13.0.0, Pillow performs quadratic copying while parsing GIF comments. GifImageFile._seek() repeatedly appends immutable bytes for comment sub-blocks and multiple comment extensions, and frame zero is parsed during Image.open(). An attacker can submit a small-dimension GIF containing many comment extensions to any application that opens the file. This can consume excessive CPU and deny service before the application can inspect the image. This issue is fixed in version 13.0.0.

Metrics

CVSS 3.x Severity and Vector Strings:

NIST: [email protected]CVSS-B:7.5 HIGHVector:CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H

References to Advisories, Solutions, and Tools

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URL	Source(s)	Tag(s)
https://github.com/python-pillow/Pillow/commit/68a3fe957d8a4d552e8c69d96066d749f0614c7e	[email protected]	Patch
https://github.com/python-pillow/Pillow/releases/tag/13.0.0	[email protected]	Release Notes
https://github.com/python-pillow/Pillow/security/advisories/GHSA-74r2-7ff9-mjj2	[email protected]	ExploitPatchVendor AdvisoryMitigation

Weakness Enumeration

CWE-ID	CWE Name	Source
CWE-407	Inefficient Algorithmic Complexity	[email protected]

Affected Products

Product	Versions
python pillow	>= 5.4.0, < 13.0.0
CPE cpe:2.3:a:python:pillow:::::::: Remediation No remediation found in references.

Change History

3 change records found show changes

Date	Action	Recorded By
Oct 27, 2026	Initial Analysis	[email protected]
Oct 20, 2026	CVE Modified	CISA-ADP
Oct 19, 2026	New CVE Received	[email protected]