CVE-2026-112901
High
Description
Pillow is a Python imaging library. Prior to 13.0.0, Pillow's XBM header parser is vulnerable to regular-expression denial of service. In XbmImageFile._open, when an application calls Image.open() on a small crafted XBM file, XbmImagePlugin applies a backtracking expression to the attacker-controlled header before image dimensions are accepted, stalling a worker for minutes and denying service. This issue is fixed in version 13.0.0.
SeverityHigh
CVSS7.5
Exploit probability—
Product
Python Pillow
PublishedOct 19, 2026
First seenOct 19, 2026
Weakness typeCWE-1333CWE-1333
How to fix
Update
- python pillow13.0.0 or later
- pillow13.0.0 or later
Affected products
| Product | Affected versions | Fixed in |
|---|---|---|
| python pillow | v < 13.0.0 | 13.0.0 |
| pillowPyPI | v < 13.0.0 | 13.0.0 |
Check your version
Choose the product and enter the version you run to see whether it falls in the affected range.
In the Intelligence 360 plan
Attack Surface Management
See the assets tied to your domains, the technologies they run and known vulnerabilities in one list.