Out-of-bounds Write Affecting pillow package, versions [,12.3.0)
Threat Intelligence
This vulnerability is trending on Twitter; this may indicate a growing threat.
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.
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Test your applications- Snyk IDSNYK-PYTHON-PILLOW-17972386
- published14 Jul 2026
- disclosed14 Jul 2026
- creditSerotav
Introduced: 14 Jul 2026
CVE-2026-59197 (opens in a new tab)How to fix?
Upgrade pillow to version 12.3.0 or higher.
Overview
Affected versions of this package are vulnerable to Out-of-bounds Write in the ImageFilter.RankFilter process when a very large odd filter size is provided, leading to unchecked signed integer arithmetic in ImagingExpand. An attacker can cause a heap out-of-bounds write by supplying crafted input to the filter size parameter.