high7.5
CVE-2026-112901
Pillow: ReDoS in XbmImagePlugin: 512-byte file stalls Image.open() for minutes
Impact
Pillow is a Python imaging library. Prior to 13.0.0, Pillow's XBM header parser is vulnerable to regular-expression denial of service. In XbmImageFile._open, when an application calls Image.open() on a small crafted XBM file, XbmImagePlugin applies a backtracking expression to the attacker-controlled header before image dimensions are accepted, stalling a worker for minutes and denying service. 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-xgh8-jp6q-p5x8
- https://github.com/python-pillow/Pillow/security/advisories/GHSA-xgh8-jp6q-p5x8
- https://nvd.nist.gov/vuln/detail/CVE-2026-112901
- https://github.com/python-pillow/Pillow/commit/2852a3e3d568997ddec745fc800991f138878f4b
- https://github.com/python-pillow/Pillow/releases/tag/13.0.0