high7.5
CVE-2026-59199
Pillow: Heap out-of-bounds write `Image.paste()` / `Image.crop()` via signed coordinate overflow
Impact
Pillow is a Python imaging library. Prior to 12.3.0, Pillow public image coordinate APIs can trigger a native heap out-of-bounds write when given coordinates near the signed 32-bit integer limits in Image.paste(), Image.crop(), or Image.alpha_composite(). This issue is fixed in version 12.3.0.
Affected packages
| Ecosystem | Package | Affected | Fixed in |
|---|---|---|---|
| pip | Pillow | < 12.3.0 | 12.3.0 |
Affected products
| Vendor | Product | Affected versions |
|---|---|---|
| Python | Pillow | before 12.3.0 |
Weakness classification
References
- NVD record
- CVE.org record
- GitHub advisory
- https://github.com/advisories/GHSA-6r8x-57c9-28j4
- https://github.com/python-pillow/Pillow/security/advisories/GHSA-6r8x-57c9-28j4
- https://nvd.nist.gov/vuln/detail/CVE-2026-59199
- https://github.com/python-pillow/Pillow/pull/9703
- https://github.com/python-pillow/Pillow/commit/ceefc348eb3c3844c7f9796ef2cc3a7dd5fbba7b
- https://github.com/pypa/advisory-database/tree/main/vulns/pillow/PYSEC-2026-3451.yaml
- https://github.com/python-pillow/Pillow/releases/tag/12.3.0