Dashboard / CVE-2026-96639

CVE-2026-96639

CRITICAL
INFO Priority: 0.06 BB Relevance: 80/100
Published: 2026-10-21 Modified: 2026-10-29 First seen: 2026-10-29 Status: active

Attack Surface

Network Low Complexity No Auth No Interaction Conf. Impact Integ. Impact

CVSS Vector Breakdown

AV: Network
AC: Low
PR: None
UI: None
S: Unchanged
C: High
I: High
A: High

Description

Pillow is a Python imaging library. From 11.0.0 until 13.0.0, multi-frame loaders can retain an ImagingCore allocation created for a narrow frame mode while a later frame of the same dimensions changes the logical mode and decoder tiles to wider RGB or CMYK data. ImageFile.load_prepare() reuses the stale native storage because _im is non-null without verifying that its mode and size still match. Crafted PSD, MPO, DCX, or MIC frame transitions can then write wider pixels into the narrow allocation, causing native out-of-bounds writes and crashes. The MPO path can also cause a native over-read and, in demonstrated runtime-specific profiles, command execution. This issue is fixed in version 13.0.0.

Weakness Classification (2)

Affected Software (4)

VendorProductVersion
python pillow 11.0.0 – 13.0.0
python pillow 11.0.0 – 13.0.0
python pillow 11.0.0 – 13.0.0
python-pillow Pillow >= 11.0.0, < 13.0.0

References & Advisories (4)

Bug Bounty Relevance

80 / 100
✓ Network accessible
✓ No authentication
✓ Low complexity
✓ No user interaction

CVSS Score

9.8 / 10.0 v3.1
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H

EPSS — Exploitation Probability

0.66%
Raw Score 0.006590
Percentile 51.4%
Date 2026-10-29

EPSS Trend

2026-10-29
0.00659
2026-10-28
0.00659

Intelligence Sources

mitre ref →
nvd ref →

External Links