CVE-2026-54059

Pillow is a Python imaging library. Prior to 12.3.0, PIL/PcfFontFile.py _load_bitmaps() read glyph dimensions from the PCF METRICS section and passed them directly to Image.frombytes() without calling Image._decompression_bomb_check(), allowing crafted PCF font data to cause excessive memory allocation. 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-8v84-f9pq-wr9x	Exploit Vendor Advisory
https://github.com/python-pillow/Pillow/security/advisories/GHSA-8v84-f9pq-wr9x	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 12.3.0, PIL/PcfFontFile.py _load_bitmaps() leía las dimensiones de los glifos de la sección PCF METRICS y las pasaba directamente a Image.frombytes() sin llamar a Image._decompression_bomb_check(), permitiendo que datos de fuentes PCF manipulados causaran una asignación excesiva de memoria. 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-2026-54059

Mitre link : CVE-2026-54059

CVE.ORG link : CVE-2026-54059

JSON object : View

Products Affected

python

pillow

CWE

CWE-789

Memory Allocation with Excessive Size Value

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