critical9.1
CVE-2026-54058
Pillow: Out-of-bounds read via attacker-controlled row stride on Pillow's mmap path (McIdas AREA files)
Impact
Pillow is a Python imaging library. Prior to 12.3.0, when Pillow loads an uncompressed McIdas AREA image from a filename through the mmap raw codec path, attacker-controlled header words can set a row stride smaller than the natural row width, causing pixel access such as Image.tobytes(), getpixel, convert, or save to read beyond the mapped region and disclose adjacent process memory or fault. 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-62p4-gmf7-7g93
- https://github.com/python-pillow/Pillow/security/advisories/GHSA-62p4-gmf7-7g93
- https://nvd.nist.gov/vuln/detail/CVE-2026-54058
- https://github.com/python-pillow/Pillow/pull/9719
- https://github.com/python-pillow/Pillow/commit/6a8de891fb00968e5ea79bfa84368ed90b3cfc1d
- https://github.com/python-pillow/Pillow/releases/tag/12.3.0