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CVE-2026-112891Pillow: Quadratic GIF comment copying during save
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.
6.9 MEDIUMEPSS 0.54%Not in KEVNVD: Analyzed
Overview
Severity
| Score | Severity | Version | Vector String |
|---|---|---|---|
| 6.9 | MEDIUM | 4.0GitHub_M (CNA) | CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:N/VI:N/VA:L/SC:N/SI:N/SA:N |
| 7.5 | HIGH | 3.1NVD | CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H |
Details
- CVE ID
- CVE-2026-112891
- Status
- Analyzed
- Assigner (CNA)
- GitHub_M
- Published
- Oct 19, 2026
- Last modified
- 2026-10-27 14:59 UTC
- Weaknesses
- CWE-407 · Inefficient Algorithmic Complexity
Affected Products
As published by the CNA in the CVE record.
python-pillowPillow1 version range
- >= 9.2.0, < 13.0.0