CVE-2026-59204
High
Description
Pillow is a Python imaging library. From 8.2.0 through 12.2.0, src/libImaging/Jpeg2KDecode.c accumulates total_component_width across every tile in a JPEG2000 image instead of recomputing it per tile, allowing a crafted tiled JPEG2000 file to force substantially higher transient memory usage and trigger out-of-memory failures during decoding. This issue is fixed in version 12.3.0.
SeverityHigh
CVSS7.5
Exploit probability—
Product
Python Pillow
PublishedJul 14, 2026
First seenJul 14, 2026
Weakness typeCWE-789CWE-789
How to fix
Update
- python pillow12.3.0 or later
- pillow12.3.0 or later
Affected products
| Product | Affected versions | Fixed in |
|---|---|---|
| python pillow | 8.2.0 ≤ v < 12.3.0 | 12.3.0 |
| pillowPyPI | 8.2.0 ≤ v < 12.3.0 | 12.3.0 |
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