7.5

CVE-2026-112891: Pillow: Quadratic GIF comment copying during save

Analyzed
AliasesDEBIAN-CVE-2026-112891GHSA-fc9g-5qg7-mf45CGA-2h88-2q93-3rgf
Published 19-10-2026Last modified 20-10-2026

Vulnerability summary

CVE-2026-112891 is a high (CVSS 7.5) Inefficient Algorithmic Complexity vulnerability in python-pillow pillow. EPSS estimates a 0.55% chance of exploitation in the next 30 days, higher than 46% of scored vulnerabilities.

Priority
Routine

Not severe (CVSS 6.9, network access); no exploitation reported by the 5 checked sources

Source freshness unavailable

How is this decided?
CVSS score
7.5/10
010
High · v3.1 (NVD)
EPSS score
0.55%
0%100%
Low · Change unavailable
KEVNot listedNot listed by any tracked catalog.
RansomwareNot flaggedNo ransomware use recorded.
Public exploits0No public exploits recorded

Advisory lineage

Upstream 0 · Downstream 1 · Related 1
SUSE-SU-2026:5038-1

Timeline

  1. 19-10-2026
    PublishedVulnerability first disclosed.
  2. 20-10-2026
    Last modifiedVulnerability information updated.

Description

Pillow is a Python imaging library. From 9.2.0 until 13.0.0, Pillow performs quadratic copying when saving a GIF with a long comment. _get_global_header() repeatedly copies portions of comment data while assembling the global header, including comments retained from an untrusted input image. An attacker can supply an image with a large GIF comment to an application that saves it as GIF. This can consume excessive CPU and delay or deny service. This issue is fixed in version 13.0.0.

CVSS metrics

9 scores · 7 sources · 2 versions

EPSS trend

Probability

0.55%

Chance of exploitation in the next 30 days

Percentile

46%

Versus all other CVEs

30-day change

Change unavailable

Change unavailable

20-10-202603-11-2026

Known exploited

Compare KEV catalogs
CISA KEV

Not in the CISA KEV catalog.

ENISA CNW

Not in the ENISA CNW catalog.

CIRCL

Not in the CIRCL catalog.

Public exploits

0 found

No public exploits indexed.

Weaknesses

CWE · root cause

Affected systems

Version check

Known conditions: network-reachable, no authentication, no user interaction (CVSS vector). Other conditions: not stated in public data.

Chainguard25 products
  • apache-beam-python-3.12-sdkAll versions (No fix recorded) | < 2.77.0-r5
  • mlflowAll versions (No fix recorded) | < 3.17.2-r2
  • mlflow-fipsAll versions (No fix recorded) | < 3.17.2-r3
  • nemo-gymAll versions (No fix recorded) | < 0.5.0_rc0_git20260729-r6
  • nemo-rl-cuda-13.0All versions (No fix recorded) | < 0.7.0-r11
Wolfi6 products
  • mlflowAll versions (No fix recorded)
  • open-webuiAll versions (No fix recorded) | < 0.12.3-r6
  • py3.10-pillowAll versions (No fix recorded)
  • py3.11-pillowAll versions (No fix recorded) | < 13.0.0-r0
  • py3.12-pillowAll versions (No fix recorded) | < 13.0.0-r0
Ubuntu2 products
  • pillowAll versions (No fix recorded)
  • pillow-python2All versions (No fix recorded)
Debian1 product
  • pillowAll versions (No fix recorded)
PyPI1 product
  • pillow≥ 9.2.0, < 13.0.0
Python1 product
Python-pillow1 product

7 vendors · 37 products

References

9 links