CVE-2026-54060

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.

CVSS v3 7.5 HIGH

7.5^/10

CVSS v3 : HIGH

Vector :

Exploitability : 3.9 / Impact : 3.6

Attack Vector NETWORK

Attack Complexity LOW

Privileges Required NONE

User Interaction NONE

Confidentiality Impact NONE

Integrity Impact NONE

Availability Impact HIGH

Scope UNCHANGED

References

Link	Resource
https://github.com/python-pillow/Pillow/blob/main/docs/releasenotes/12.3.0.rst	Release Notes
https://github.com/python-pillow/Pillow/commit/0a263e6264aa5399988d9acd3bbfbca2ca3ec77d	Patch
https://github.com/python-pillow/Pillow/security/advisories/GHSA-5x94-69rx-g8h2	Exploit Vendor Advisory
https://github.com/python-pillow/Pillow/security/advisories/GHSA-5x94-69rx-g8h2	Exploit Vendor Advisory

Configurations

Configuration 1 (hide)

cpe:2.3:a:python:pillow:*:*:*:*:*:*:*:*

History

25 Oct 2026, 20:10

Type	Values Removed	Values Added
Summary		(es) Pillow es una biblioteca de imágenes de Python. Antes de la versión 12.3.0, PIL/FontFile.py FontFile.compile() ensamblaba imágenes por glifo en un mapa de bits combinado con Image.new(’1’, (xsize, ysize)) sin llamar a Image._decompression_bomb_check(), permitiendo que una fuente desencadenara una asignación excesiva durante la conversión o el guardado. Este problema está solucionado en la versión 12.3.0.

Information

Published : 2026-07-06 19:17

Updated : 2026-10-25 20:10

NVD link : CVE-2026-54060

Mitre link : CVE-2026-54060

CVE.ORG link : CVE-2026-54060

JSON object : View

Products Affected

python

pillow

CWE

CWE-789

Memory Allocation with Excessive Size Value

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