CVE-2026-54058
Severity CVSS v4.0:
HIGH
Type:
CWE-125
Out-of-bounds Read
Publication date:
14/07/2026
Last modified:
15/07/2026
Description
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.
Impact
Base Score 4.0
8.30
Severity 4.0
HIGH
References to Advisories, Solutions, and Tools
- https://github.com/python-pillow/Pillow/commit/6a8de891fb00968e5ea79bfa84368ed90b3cfc1d
- https://github.com/python-pillow/Pillow/pull/9719
- https://github.com/python-pillow/Pillow/releases/tag/12.3.0
- https://github.com/python-pillow/Pillow/security/advisories/GHSA-62p4-gmf7-7g93
- https://github.com/python-pillow/Pillow/security/advisories/GHSA-62p4-gmf7-7g93