high7.1
CVE-2026-112896
Pillow: TIFF encoder ColorMap plane-size mismatch causes a heap out-of-bounds read
Impact
Pillow is a Python imaging library. Prior to 13.0.0, Pillow's TIFF encoder can read beyond a ColorMap buffer when retained TIFF metadata has a plane size inconsistent with BitsPerSample. A small TIFF can be opened normally and then retain a crafted ColorMap that is reused when the image is saved. An application that re-encodes the attacker's TIFF with libtiff can trigger the out-of-bounds read. This can disclose heap memory in the output or crash the process. This issue is fixed in version 13.0.0.
Affected packages
| Ecosystem | Package | Affected | Fixed in |
|---|---|---|---|
| pip | Pillow | <= 12.3.0 | 13.0.0 |
Affected products
| Vendor | Product | Affected versions |
|---|---|---|
| Python | Pillow | before 13.0.0 |
Weakness classification
References
- NVD record
- CVE.org record
- GitHub advisory
- https://github.com/advisories/GHSA-pchr-8j38-3x4p
- https://github.com/python-pillow/Pillow/security/advisories/GHSA-pchr-8j38-3x4p
- https://nvd.nist.gov/vuln/detail/CVE-2026-112896
- https://github.com/python-pillow/Pillow/commit/d03dc3c587a9b0bdc9e4304d70d59a635a87b742
- https://github.com/python-pillow/Pillow/releases/tag/13.0.0