Dashboard / CVE-2026-112399

CVE-2026-112399

HIGH
MEDIUM Priority: 0.05 BB Relevance: 78/100
Published: 2026-10-19 Modified: 2026-10-28 First seen: 2026-10-29 Status: active

Attack Surface

Network Low Complexity No Auth No Interaction

CVSS Vector Breakdown

AV: Network
AC: Low
PR: None
UI: None
AT: None
VC: None
VI: None
VA: High

Description

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.

Weakness Classification (1)

Affected Software (2)

VendorProductVersion
python pillow 8.1.0 – 13.0.0
python-pillow Pillow >= 8.1.0, < 13.0.0

References & Advisories (3)

Bug Bounty Relevance

78 / 100
✓ Network accessible
✓ No authentication
✓ Low complexity
✓ No user interaction

CVSS Score

8.7 / 10.0 v4.0
CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:N/VI:N/VA:H/SC:N/SI:N/SA:N

EPSS — Exploitation Probability

0.53%
Raw Score 0.005290
Percentile 44.7%
Date 2026-10-29

EPSS Trend

2026-10-29
0.00529
2026-10-28
0.00529

Intelligence Sources

mitre ref →
nvd ref →

External Links