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.

• CWE-125

• https://github.com/python-pillow/Pillow/commit/4cf46bee338304c5c8968fd7f132ba0d40c428b7Patch
• https://github.com/python-pillow/Pillow/pull/10120Issue Tracking
• https://github.com/python-pillow/Pillow/releases/tag/13.0.0Release Notes
• https://github.com/python-pillow/Pillow/security/advisories/GHSA-9v9v-9qvf-h2hjVendor Advisory
• https://github.com/python-pillow/Pillow/security/advisories/GHSA-9v9v-9qvf-h2hjVendor Advisory

Published

Oct 21, 2026

Last Modified

Oct 28, 2026

Status

Modified

• How Strix found a critical auth bypass in etcdStrix autonomously discovered a critical authentication bypass in etcd, later designated CVE-2026-33413.
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