CVE-2026-112891
High
Description
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.
SeverityHigh
CVSS7.5
Exploit probability—
Product
Python Pillow
PublishedOct 19, 2026
First seenOct 19, 2026
Weakness typeCWE-407CWE-407
How to fix
Update
- python pillow13.0.0 or later
- pillow13.0.0 or later
Affected products
| Product | Affected versions | Fixed in |
|---|---|---|
| python pillow | 9.2.0 ≤ v < 13.0.0 | 13.0.0 |
| pillowPyPI | 9.2.0 ≤ v < 13.0.0 | 13.0.0 |
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