CVE-2026-112893

Pillow: Invalid free in FreeType glyph rendering when a stroker is active

Description

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.

Scores

Weaknesses (CWE)

• CWE-457
• CWE-763

Advisories

• GHSA-j4m9-6w36-pw47 — Pillow: Invalid free in FreeType glyph rendering when a stroker is active

European references

• ENISA EUVD · EUVD-2026-104655
• GCVE · GCVE-0-2026-112893

Affected configurations (NVD CPE)

• cpe:2.3:a:python:pillow:*:*:*:*:*:*:*:* ≥ 10.0.0 < 13.0.0

Affected products

References

• https://github.com/python-pillow/Pillow/security/advisories/GHSA-j4m9-6w36-pw47
• https://github.com/python-pillow/Pillow/commit/a7416de7f3a43128179d2cf68df3240ea8dafe13
• https://github.com/python-pillow/Pillow/releases/tag/13.0.0

Sources