PT-2026-55963 · Python Pillow · Pillow

Dino320 · Published 2026-07-06 · Updated 2026-07-06 · CVE-2026-54060

NVD

CVSS v3.1

7.5

High

Base vector

AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H

Pillow is a Python imaging library. Prior to 12.3.0, PIL/FontFile.py FontFile.compile() assembled per-glyph images into a combined bitmap with Image.new("1", (xsize, ysize)) without calling Image. decompression bomb check(), allowing a font to trigger excessive allocation during conversion or saving. This issue is fixed in version 12.3.0.

Fix

Weakness Enumeration

CWE-789

Related Identifiers

CVE-2026-54060

Affected Products

Pillow

References · 4

• https://nvd.nist.gov/vuln/detail/CVE-2026-54060 · Security Note
• https://github.com/python-pillow/Pillow/commit/0a263e6264aa5399988d9acd3bbfbca2ca3ec77d · Note
• https://github.com/python-pillow/Pillow/blob/main/docs/releasenotes/12.3.0.rst · Note
• https://github.com/python-pillow/Pillow/security/advisories/GHSA-5x94-69rx-g8h2 · Note