Skip to content
Fencer Intel
low 3.7

CVE-2026-86421 json

ImageMagick before 7.1.2-30 Memory Leak via MSL decoder

published 2mo ago modified 13d ago also EUVD-2026-72379 , GHSA-4jv7-q6xw-6f4x

Unreviewed: the maintainers' own advisory

Published by the maintainers on their GitHub repository ImageMagick/ImageMagick. GitHub has not reviewed it into the GitHub Advisory Database, so the affected packages and versions are the maintainers' word. Read the full advisory on GitHub.

cvss
3.7
version 3.1, CNA
cisa kev
Not listed
not in CISA's catalog
epss
0.5%
EPSS 0.5% chance of exploitation in 30 days, percentile 39%
public exploits
0
none known

Summary

ImageMagick before 7.1.2-30 and 6.9.13-55 contains a memory leak in the MSL image decoder. A crafted MSL image triggers memory allocation without proper deallocation, allowing an attacker to exhaust memory and cause a denial of service.

Patch / fix

  • ImageMagick ImageMagick 6.9.13-55, 7.1.2-30
  • imagemagick Debian 12 8:6.9.11.60+dfsg-1.6+deb12u14
  • imagemagick Debian 13 8:7.1.1.43+dfsg1-1+deb13u13
  • imagemagick Debian 14 8:7.1.2.31+dfsg1-1

debian advisories DEBIAN-CVE-2026-86421

  • ImageMagick SLE Module for Development Tools 15 SP7, SLE Module for Desktop Applications 15 SP7 7.1.1.43-150700.3.84.1
  • ImageMagick SLE Module for Desktop Applications 15 SP7 7.1.0.9-150400.6.113.1
  • ImageMagick SLES for SAP applications 16.0, SLES 16.0 7.1.2.0-160000.15.1
  • ImageMagick SLES for SAP 15 SP6, SLES 15 SP6-LTSS 7.1.1.21-150600.3.87.1
  • ImageMagick SLES LTSS Extended Security 12 SP5 6.8.8.1-71.273.2

suse advisories SUSE-SU-2026:4691-1SUSE-SU-2026:4376-1SUSE-SU-2026:4334-1SUSE-SU-2026:23901-1SUSE-SU-2026:4265-1

  • ImageMagick openSUSE Leap 16.0 7.1.2.0-160000.15.1
  • ImageMagick openSUSE Tumbleweed 7.1.2.31-1.1

opensuse advisories openSUSE-SU-2026:21911-1openSUSE-SU-2026:11801-1

Is CVE-2026-86421 in your stack? Fencer shows which of your repositories are affected as soon as an advisory lands, and opens the fix as a pull request.

Check with Fencer

Vendor advisories

What the vendors themselves say about their products: affected, fixed or not affected, and what to do.

red hat product security vex CVE-2026-86421 updated cvss 3.7

ImageMagick: ImageMagick: Denial of Service via memory leak in MSL decoder

  • Red Hat Enterprise Linux 6 ImageMagick, ImageMagick-c++, ImageMagick-perl Red Hat Enterprise Linux 7 ImageMagick, ImageMagick-c++, ImageMagick-perl
    affected: workaround, no fix available “Fix deferred”

Red Hat CSAF VEX © Red Hat, Inc., from https://security.access.redhat.com/data/csaf/v2/vex/; changed: reduced to product statuses and remediations. CC BY 4.0 · csaf

CISA SSVC

Exploitation
none
Automatable
no
Technical impact
partial
Assessed
2mo ago

Exploit prediction

0.45% chance of exploitation in the next 30 days, higher than 39% of all scored CVEs (FIRST EPSS, 2026-11-11).

CVSS scores

assigned by version score vector
CNA 4.0 6.3 CVSS:4.0/AV:N/AC:H/AT:P/PR:N/UI:N/VC:N/VI:N/VA:L/SC:N/SI:N/SA:N
CNA 3.1 3.7 CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:N/I:N/A:L
CNA 4.0 6.3 CVSS:4.0/AV:N/AC:H/AT:P/PR:N/UI:N/VC:N/VI:N/VA:L/SC:N/SI:N/SA:N/E:X/CR:X/IR:X/AR:X/MAV:X/MAC:X/MAT:X/MPR:X/MUI:X/MVC:X/MVI:X/MVA:X/MSC:X/MSI:X/MSA:X/S:X/AU:X/R:X/V:X/RE:X/U:X
NVD 3.1 7.5 CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H

Affected products

  • ImageMagick ImageMagick

Classification

Weakness
  • CWE-400 Uncontrolled Resource Consumption

References

Sources

Fencer Intel keeps one entry per vulnerability: the CVE id wins, then GHSA, and records that alias each other are merged, except that two CVEs always keep separate entries. The same data is available as JSON.

The maintainers of ImageMagick/ImageMagick published their own advisory on GitHub. Reviewed sources take precedence over it.