Pillow is a Python imaging library. From 10.0.0 until 13.0.0, Pillow can free an invalid glyph pointer during FreeType rendering with an active stroker. If FT_Load_Glyph fails, cleanup may call FT_Done_Glyph on an uninitialized or stale glyph variable. An attacker can supply a malformed font as untrusted bytes to an application that draws text with a nonzero stroke width, forcing the glyph-load failure path. This can corrupt memory or crash the process. This issue is fixed in version 13.0.0.
Fix
Patch, vendor advisory and mitigation references on NVD 3
- https://github.com/python-pillow/Pillow/commit/a7416de7f3a43128179d2cf68df3240ea8dafe13 Patch
- https://github.com/python-pillow/Pillow/security/advisories/GHSA-j4m9-6w36-pw47 Exploit, Vendor Advisory
- https://github.com/python-pillow/Pillow/security/advisories/GHSA-j4m9-6w36-pw47 Exploit, Vendor Advisory
Every line above is quoted from NVD, CISA, Microsoft, the vendor's own advisory or DISA; nothing is generated.
Change history 6
- StatusAnalyzed → ModifiedNVD modified 2026-10-28 16:17
- Cpes+1 CPE criteria (now 1)NVD modified 2026-10-27 14:59
- StatusUndergoing Analysis → AnalyzedNVD modified 2026-10-27 14:59
- StatusPublished → Undergoing AnalysisNVD modified 2026-10-20 19:48
- StatusReceived → PublishedNVD modified 2026-10-19 21:53
- First seenCVSS 8.2NVD modified 2026-10-19 22:17
Affected (CPE criteria) 1
cpe:2.3:a:python:pillow:*:*:*:*:*:*:*:*
References 4
- https://github.com/python-pillow/Pillow/commit/a7416de7f3a43128179d2cf68df3240ea8dafe13 Patch
- https://github.com/python-pillow/Pillow/releases/tag/13.0.0 Release Notes
- https://github.com/python-pillow/Pillow/security/advisories/GHSA-j4m9-6w36-pw47 Exploit, Vendor Advisory
- https://github.com/python-pillow/Pillow/security/advisories/GHSA-j4m9-6w36-pw47 Exploit, Vendor Advisory