Dashboard / CVE-2026-96641

CVE-2026-96641

MEDIUM
MEDIUM Priority: 0.02 BB Relevance: 63/100
Published: 2026-10-21 Modified: 2026-10-28 First seen: 2026-10-29 Status: active

Attack Surface

Network Low Complexity No Auth

CVSS Vector Breakdown

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

Description

Pillow is a Python imaging library. Prior to 13.0.0, PILfont text-width accumulation in src/_imaging.c checks positive glyph advances against INT_MAX but does not check negative advances against INT_MIN. Repeating a signed 16-bit advance of -32768 can therefore execute a signed C integer overflow in xsize += dx, producing a large positive width from a negative mathematical result. Applications that use getlength(), getsize(), or derived layout, quota, serialization, or allocation calculations can experience logic-integrity errors or resource consumption, while the high-level mask path commonly retains a decompression-bomb check. This issue is fixed in version 13.0.0.

Weakness Classification (1)

Affected Software (4)

VendorProductVersion
python pillow < 13.0.0
python pillow < 13.0.0
python-pillow Pillow < 13.0.0
python-pillow Pillow < 13.0.0

References & Advisories (4)

Bug Bounty Relevance

63 / 100
✓ Network accessible
✓ No authentication
✓ Low complexity

CVSS Score

6.5 / 10.0 v3.1
CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:N/I:N/A:H

EPSS — Exploitation Probability

0.34%
Raw Score 0.003450
Percentile 28.0%
Date 2026-10-29

EPSS Trend

2026-10-29
0.00345
2026-10-28
0.00345

Intelligence Sources

mitre ref →
nvd ref →

External Links