7.1Alta
CVE-2026-96643Pillow: PNG eXIf chunk makes EXIF parsing run in quadratic time
Descripción
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.
Debilidad (CWE):
CWE-407
Datos: CVE.org, NVD, CISA KEV, FIRST EPSS, Ubuntu. Se publican tal como los indican las fuentes, en inglés.
Productos y versiones afectados
| Fabricante | Producto | Versiones | |
|---|---|---|---|
| python | pillow | 11.0.0 – < 13.0.0 | |
| python-pillow | Pillow | >= 11.0.0, < 13.0.0 |
Referencias y parches
- https://github.com/python-pillow/Pillow/security/advisories/GHSA-g4qv-2jxx-769h Vendor Advisory
- https://github.com/python-pillow/Pillow/pull/10073 Issue Tracking
- https://github.com/python-pillow/Pillow/commit/806e38381c781f32bbd22f4cd026678acd40fd6c Patch
- https://github.com/python-pillow/Pillow/releases/tag/13.0.0 Release Notes
Coincidencias CPE (NVD) (1)
cpe:2.3:a:python:pillow:*:*:*:*:*:*:*:*≥ 11.0.0 < 13.0.0