CVE-2026-42309

Pillow is a Python imaging library. From version 11.2.1 to before version 12.2.0, passing nested lists as coordinates to APIs that accept coordinates such as ImagePath.Path, ImageDraw.ImageDraw.polygon and ImageDraw.ImageDraw.line could cause a heap buffer overflow, as nested lists were recursively unpacked beyond the allocated buffer. Coordinate lists are now validated to contain exactly two numeric coordinates. This issue has been patched in version 12.2.0.

CVSS v3 5.5 MEDIUM

5.5^/10

CVSS v3 : MEDIUM

Vector :

Exploitability : 1.8 / Impact : 3.6

Attack Vector LOCAL

Attack Complexity LOW

Privileges Required LOW

User Interaction NONE

Confidentiality Impact NONE

Integrity Impact NONE

Availability Impact HIGH

Scope UNCHANGED

References

Link	Resource
https://github.com/python-pillow/Pillow/releases/tag/12.2.0	Product Release Notes
https://github.com/python-pillow/Pillow/security/advisories/GHSA-5xmw-vc9v-4wf2	Vendor Advisory

Configurations

Configuration 1 (hide)

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

History

12 May 2026, 17:57

Type	Values Removed	Values Added
References	~~() https://github.com/python-pillow/Pillow/releases/tag/12.2.0 -~~	() https://github.com/python-pillow/Pillow/releases/tag/12.2.0 - Product, Release Notes
References	~~() https://github.com/python-pillow/Pillow/security/advisories/GHSA-5xmw-vc9v-4wf2 -~~	() https://github.com/python-pillow/Pillow/security/advisories/GHSA-5xmw-vc9v-4wf2 - Vendor Advisory
CVSS	v2 : ~~unknown~~ v3 : ~~unknown~~	v2 : unknown v3 : 5.5
First Time		Python Python pillow
CPE		cpe:2.3:a:python:pillow::::::::

09 May 2026, 06:16

Type	Values Removed	Values Added
New CVE

Information

Published : 2026-05-09 06:16

Updated : 2026-05-12 17:57

NVD link : CVE-2026-42309

Mitre link : CVE-2026-42309

CVE.ORG link : CVE-2026-42309

JSON object : View

Products Affected

python

pillow

CWE

CWE-122

Heap-based Buffer Overflow

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