CVE-2026-112399

  1. OpenCVE
  2. Vulnerabilities (CVE)
  3. CVE-2026-112399
Pillow is a Python imaging library. From 8.1.0 until 13.0.0, Pillow can allocate an APNG disposal background at the full canvas size before applying the decompression-bomb check. A crafted APNG with a small first frame, a very large declared canvas, and background disposal or first-frame OP_PREVIOUS reaches PngImageFile._seek while Image.open() positions frame zero. The full-canvas allocation occurs inside Image.open() without requiring pixel loading or frame iteration. This can exhaust memory and deny service. This issue is fixed in version 13.0.0.

7.5 /10

CVSS v3 : HIGH

V3 Legend

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/commit/f1acfc54c53502948d0d14121872061df931db48 Patch
https://github.com/python-pillow/Pillow/releases/tag/13.0.0 Release Notes
https://github.com/python-pillow/Pillow/security/advisories/GHSA-5xm2-6676-qcp9 Exploit Mitigation Patch Vendor Advisory
https://github.com/python-pillow/Pillow/security/advisories/GHSA-5xm2-6676-qcp9 Exploit Mitigation Patch Vendor Advisory
Configurations

Configuration 1 (hide)

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

28 Oct 2026, 16:17

Type Values Removed Values Added
References () https://github.com/python-pillow/Pillow/security/advisories/GHSA-5xm2-6676-qcp9 - Exploit, Mitigation, Patch, Vendor Advisory () https://github.com/python-pillow/Pillow/security/advisories/GHSA-5xm2-6676-qcp9 - Exploit, Mitigation, Patch, Vendor Advisory

27 Oct 2026, 21:02

Type Values Removed Values Added
References () https://github.com/python-pillow/Pillow/commit/f1acfc54c53502948d0d14121872061df931db48 - () https://github.com/python-pillow/Pillow/commit/f1acfc54c53502948d0d14121872061df931db48 - Patch
References () https://github.com/python-pillow/Pillow/releases/tag/13.0.0 - () https://github.com/python-pillow/Pillow/releases/tag/13.0.0 - Release Notes
References () https://github.com/python-pillow/Pillow/security/advisories/GHSA-5xm2-6676-qcp9 - () https://github.com/python-pillow/Pillow/security/advisories/GHSA-5xm2-6676-qcp9 - Exploit, Mitigation, Patch, Vendor Advisory
First Time Python
Python pillow
CPE cpe:2.3:a:python:pillow:*:*:*:*:*:*:*:*
CVSS v2 : unknown
v3 : unknown 		v2 : unknown
v3 : 7.5

19 Oct 2026, 22:17

Type Values Removed Values Added
New CVE
Information

Published : 2026-10-19 22:17

Updated : 2026-10-28 16:17

NVD link : CVE-2026-112399

Mitre link : CVE-2026-112399

CVE.ORG link : CVE-2026-112399

JSON object : View

Products Affected

python

  • pillow
CWE
CWE-789

Memory Allocation with Excessive Size Value