high7.5
CVE-2026-112891
Pillow: Quadratic GIF comment copying during save
Impact
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.
Affected packages
| Ecosystem | Package | Affected | Fixed in |
|---|---|---|---|
| pip | pillow | >= 9.2.0, < 13.0.0 | 13.0.0 |
Affected products
| Vendor | Product | Affected versions |
|---|---|---|
| Python | Pillow | from 9.2.0 before 13.0.0 |
Weakness classification
References
- NVD record
- CVE.org record
- GitHub advisory
- https://github.com/advisories/GHSA-fc9g-5qg7-mf45
- https://github.com/python-pillow/Pillow/security/advisories/GHSA-fc9g-5qg7-mf45
- https://nvd.nist.gov/vuln/detail/CVE-2026-112891
- https://github.com/python-pillow/Pillow/commit/68a3fe957d8a4d552e8c69d96066d749f0614c7e
- https://github.com/python-pillow/Pillow/releases/tag/13.0.0