CVE-2026-59197
8.2
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:L/A:H
Summary
Pillow is a Python imaging library. Prior to 12.3.0, Pillow's public rank-filter API can trigger a native heap out-of-bounds write when given a very large odd filter size because ImageFilter.RankFilter.filter() calls image.expand(size // 2, size // 2) before rank-filter size validation and ImagingExpand() computes output dimensions with unchecked signed int arithmetic. This issue is fixed in version 12.3.0.
Affected Software
| Vendor | Product | Version Range | Status |
|---|---|---|---|
| python-pillow | Pillow | < 12.3.0 | affected |
Weaknesses
- CWE-787: CWE-787: Out-of-bounds Write
- CWE-190: CWE-190: Integer Overflow or Wraparound
References
- https://github.com/python-pillow/Pillow/security/advisories/GHSA-xj96-63gp-2gmr
- https://github.com/python-pillow/Pillow/pull/9695
- https://github.com/python-pillow/Pillow/commit/cce3bdb867c77a3420261ed1bfdb6b0787ec8fc1
- https://github.com/python-pillow/Pillow/releases/tag/12.3.0
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