CVE-2026-96644

Pillow is a Python imaging library. Prior to 13.0.0 on Windows, src/PIL/WmfImagePlugin.py passes unchecked 32-bit WMF or EMF dimensions to the native drawwmf handler in src/display.c. The handler sizes a DIB allocation from 16-bit-truncated bcWidth and bcHeight fields but copies pixel data using the original full dimensions. A crafted wide, short metafile can pass the pixel-count decompression-bomb check and make the Windows-only renderer read beyond the heap buffer, potentially disclosing memory or crashing the process. This issue is fixed in version 13.0.0.
Configurations

Configuration 1 (hide)

AND
cpe:2.3:a:python:pillow:*:*:*:*:*:*:*:*
cpe:2.3:o:microsoft:windows:-:*:*:*:*:*:*:*

History

28 Oct 2026, 19:19

Type Values Removed Values Added
References () https://github.com/python-pillow/Pillow/security/advisories/GHSA-9v9v-9qvf-h2hj - Vendor Advisory () https://github.com/python-pillow/Pillow/security/advisories/GHSA-9v9v-9qvf-h2hj - Vendor Advisory

27 Oct 2026, 14:27

Type Values Removed Values Added
References () https://github.com/python-pillow/Pillow/commit/4cf46bee338304c5c8968fd7f132ba0d40c428b7 - () https://github.com/python-pillow/Pillow/commit/4cf46bee338304c5c8968fd7f132ba0d40c428b7 - Patch
References () https://github.com/python-pillow/Pillow/pull/10120 - () https://github.com/python-pillow/Pillow/pull/10120 - Issue Tracking
References () https://github.com/python-pillow/Pillow/releases/tag/13.0.0 - () https://github.com/python-pillow/Pillow/releases/tag/13.0.0 - Release Notes
References () https://github.com/python-pillow/Pillow/security/advisories/GHSA-9v9v-9qvf-h2hj - () https://github.com/python-pillow/Pillow/security/advisories/GHSA-9v9v-9qvf-h2hj - Vendor Advisory
CPE cpe:2.3:o:microsoft:windows:-:*:*:*:*:*:*:*
cpe:2.3:a:python:pillow:*:*:*:*:*:*:*:*
First Time Microsoft windows
Microsoft
Python pillow
Python
CVSS v2 : unknown
v3 : unknown
v2 : unknown
v3 : 8.1

21 Oct 2026, 21:20

Type Values Removed Values Added
New CVE

Information

Published : 2026-10-21 21:20

Updated : 2026-10-28 19:19


NVD link : CVE-2026-96644

Mitre link : CVE-2026-96644

CVE.ORG link : CVE-2026-96644


JSON object : View

Products Affected

microsoft

  • windows

python

  • pillow
CWE
CWE-125

Out-of-bounds Read