CVE-2026-59199
High
Description
Pillow is a Python imaging library. Prior to 12.3.0, Pillow public image coordinate APIs can trigger a native heap out-of-bounds write when given coordinates near the signed 32-bit integer limits in Image.paste(), Image.crop(), or Image.alpha_composite(). 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-190Integer overflowCWE-787Out-of-bounds write
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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