Out-of-bounds Write Affecting pillow package, versions [10.3.0,12.2.0)
Threat Intelligence
The probability is the direct output of the EPSS model, and conveys an overall sense of the threat of exploitation in the wild. The percentile measures the EPSS probability relative to all known EPSS scores. Note: This data is updated daily, relying on the latest available EPSS model version. Check out the EPSS documentation for more details.
Do your applications use this vulnerable package?
In a few clicks we can analyze your entire application and see what components are vulnerable in your application, and suggest you quick fixes.
Test your applications- Snyk IDSNYK-PYTHON-PILLOW-16419303
- published5 May 2026
- disclosed4 May 2026
- creditEthan Kim
Introduced: 4 May 2026
CVE-2026-42311 (opens in a new tab)How to fix?
Upgrade pillow to version 12.2.0 or higher.
Overview
Affected versions of this package are vulnerable to Out-of-bounds Write in the _setimage() functions in encode.c and decode.c, which are exploitable via Image.open(). An attacker can execute arbitrary code by supplying a malicious PSD image file with tile dimensions that trigger integer overflows.
Note: This is a bypass for the vulnerability described in CVE-2026-25990.