CVE-2026-59197

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.
Configurations

Configuration 1 (hide)

cpe:2.3:a:python:pillow:*:*:*:*:*:*:*:*

History

21 Jul 2026, 19:17

Type Values Removed Values Added
References () https://github.com/python-pillow/Pillow/security/advisories/GHSA-xj96-63gp-2gmr - Exploit, Vendor Advisory () https://github.com/python-pillow/Pillow/security/advisories/GHSA-xj96-63gp-2gmr - Exploit, Vendor Advisory

21 Jul 2026, 15:52

Type Values Removed Values Added
CPE cpe:2.3:a:python:pillow:*:*:*:*:*:*:*:*
First Time Python
Python pillow
References () https://github.com/python-pillow/Pillow/commit/cce3bdb867c77a3420261ed1bfdb6b0787ec8fc1 - () https://github.com/python-pillow/Pillow/commit/cce3bdb867c77a3420261ed1bfdb6b0787ec8fc1 - Patch
References () https://github.com/python-pillow/Pillow/pull/9695 - () https://github.com/python-pillow/Pillow/pull/9695 - Issue Tracking, Patch
References () https://github.com/python-pillow/Pillow/releases/tag/12.3.0 - () https://github.com/python-pillow/Pillow/releases/tag/12.3.0 - Release Notes
References () https://github.com/python-pillow/Pillow/security/advisories/GHSA-xj96-63gp-2gmr - () https://github.com/python-pillow/Pillow/security/advisories/GHSA-xj96-63gp-2gmr - Exploit, Vendor Advisory

14 Jul 2026, 17:17

Type Values Removed Values Added
New CVE

Information

Published : 2026-07-14 17:17

Updated : 2026-07-21 19:17


NVD link : CVE-2026-59197

Mitre link : CVE-2026-59197

CVE.ORG link : CVE-2026-59197


JSON object : View

Products Affected

python

  • pillow
CWE
CWE-190

Integer Overflow or Wraparound

CWE-787

Out-of-bounds Write