CVE-2026-96643
Pillow is a Python imaging library. From 11.0.0 until 13.0.0, Exif.load() in src/PIL/Image.py repeatedly slices the remaining EXIF data while it begins with the six-byte Exif header. src/PIL/PngImagePlugin.py accepts an uncapped PNG eXIf chunk, so a file filled with repeated headers causes a new shrinking copy on every iteration and quadratic CPU work. The condition is reachable through Image.getexif(), Image._getexif(), and ImageOps.exif_transpose(), including common photo-upload rotation workflows. This issue is fixed in version 13.0.0.
- Score
- CVSS 4.0 7.1 High
- Status
- Analyzed - security-advisories@github.com
- Published
- 2026-10-21
- Last modified
- 2026-10-27
- Weaknesses
- CWE-407
Affected products
References
- https://github.com/python-pillow/Pillow/security/advisories/GHSA-g4qv-2jxx-769h
- https://github.com/python-pillow/Pillow/pull/10073
- https://github.com/python-pillow/Pillow/commit/806e38381c781f32bbd22f4cd026678acd40fd6c
- https://github.com/python-pillow/Pillow/releases/tag/13.0.0
