CVE-2026-54058
Critical
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.
SeverityCritical
CVSS9.1
Exploit probability—
Product
Python Pillow
PublishedJul 14, 2026
First seenJul 14, 2026
Weakness typeCWE-125Out-of-bounds read
How to fix
Update
- python pillow12.3.0 or later
- pillow12.3.0 or later
Affected products
| Product | Affected versions | Fixed in |
|---|---|---|
| python pillow | v < 12.3.0 | 12.3.0 |
| pillowPyPI | v < 12.3.0 | 12.3.0 |
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