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Fencer Vulns
high 8.1

CVE-2026-23876 json

Heap buffer overflow with attacker-controlled data in XBM parser

published 2026-01-20 9 mo ago modified 2026-07-30 3 mo ago also EUVD-2026-3589 , JLSEC-2026-936

cvss
8.1
version 3.1, CNA
cisa kev
Not listed
not in CISA's catalog
epss
0.7%
EPSS 0.7% chance of exploitation in 30 days, percentile 52%
public exploits
0
none known

Summary

ImageMagick is free and open-source software used for editing and manipulating digital images. Prior to versions 7.1.2-13 and 6.9.13-38, a heap buffer overflow vulnerability in the XBM image decoder (ReadXBMImage) allows an attacker to write controlled data past the allocated heap buffer when processing a maliciously crafted image file. Any operation that reads or identifies an image can trigger the overflow, making it exploitable via common image upload and processing pipelines. Versions 7.1.2-13 and 6.9.13-38 fix the issue.

Patch / fix

  • julia ImageMagick_jll 7.1.2023+0
  • Red Hat Red Hat Enterprise Linux 7 Extended Lifecycle Support 0:6.9.10.68-10.el7_9
  • imagemagick Debian 12 8:6.9.11.60+dfsg-1.6+deb12u6
  • imagemagick Debian 13 8:7.1.1.43+dfsg1-1+deb13u5
  • imagemagick Debian 14 8:7.1.2.13+dfsg1-1

debian advisories DEBIAN-CVE-2026-23876

  • imagemagick Ubuntu Pro 14.04 LTS 8:6.7.7.10-6ubuntu3.13+esm18
  • imagemagick Ubuntu Pro 16.04 LTS 8:6.8.9.9-7ubuntu5.16+esm17
  • imagemagick Ubuntu Pro 18.04 LTS 8:6.9.7.4+dfsg-16ubuntu6.15+esm9
  • imagemagick Ubuntu Pro 20.04 LTS 8:6.9.10.23+dfsg-2.1ubuntu11.11+esm7
  • imagemagick Ubuntu Pro 22.04 LTS 8:6.9.11.60+dfsg-1.3ubuntu0.22.04.5+esm7
  • imagemagick Ubuntu Pro 24.04 LTS 8:6.9.12.98+dfsg1-5.2ubuntu0.1~esm6

ubuntu advisories UBUNTU-CVE-2026-23876

Ubuntu security data © Canonical Ltd., from https://github.com/canonical/ubuntu-security-notices via OSV; changed: normalised to fixed package versions per release. CC BY-SA 4.0

  • ImageMagick RHEL 7 ELS 6.9.10.68-10.el7_9
  • ImageMagick-c++ RHEL 7 ELS 6.9.10.68-10.el7_9
  • ImageMagick-perl RHEL 7 ELS 6.9.10.68-10.el7_9

red hat advisories RHSA-2026:3058

  • ImageMagick SLES for SAP 15 SP6, SLES for SAP 15 SP5, SLES for SAP 15 SP4 +8 more 7.1.0.9-150400.6.64.1
  • ImageMagick SLES for SAP 15 SP6, SLES 15 SP6-LTSS, openSUSE Leap 15.6 7.1.1.21-150600.3.38.1
  • ImageMagick SLE Module for Development Tools 15 SP7, SLE Module for Desktop Applications 15 SP7 7.1.1.43-150700.3.33.1
  • ImageMagick SLES LTSS Extended Security 12 SP5, SLES 12 SP5-LTSS 6.8.8.1-71.227.1

suse advisories SUSE-SU-2026:0503-1SUSE-SU-2026:0438-1SUSE-SU-2026:0437-1SUSE-SU-2026:0384-1

  • ImageMagick openSUSE Leap 16.0 7.1.2.0-160000.6.1
  • ImageMagick openSUSE Tumbleweed 7.1.2.13-2.1

opensuse advisories openSUSE-SU-2026:20337-1openSUSE-SU-2026:10119-1

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-2026-23876 updated cvss 8.1

ImageMagick: ImageMagick: Arbitrary code execution via a crafted XBM image file

  • Red Hat Enterprise Linux 6 ImageMagick, ImageMagick-c++, ImageMagick-perl
    affected: workaround, no fix planned “Out of support scope”
  • Red Hat Enterprise Linux Server (v. 7 ELS) ImageMagick 6.9.10.68-10.el7_9, ImageMagick-c++ 6.9.10.68-10.el7_9, ImageMagick-perl 6.9.10.68-10.el7_9 Red Hat Enterprise Linux Server Optional (v. 7 ELS) ImageMagick-c++ 6.9.10.68-10.el7_9
    fixed: vendor fix RHSA-2026:3058

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
total
Assessed
9 mo ago

Exploit prediction

0.68% chance of exploitation in the next 30 days, higher than 52% of all scored CVEs (FIRST EPSS, 2026-11-08).

Exploits and checks

  • github.com https://github.com/ImageMagick/ImageMagick/security/advisories/GHSA-r49w-jqq3-3gx8 referenced PoC, tagged "exploit" by a source, unverified

CVSS scores

assigned by version score vector
CNA 3.1 8.1 CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:H/I:H/A:H
CISA ADP 3.1 8.1 CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:H/I:H/A:H
NVD 3.1 9.8 CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H
OSV 3.1 9.8 CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H

Affected packages

ecosystem package affected fixed in
julia ImageMagick_jll
<7.1.2023+0
7.1.2023+0

Affected products

  • ImageMagick ImageMagick
  • Red Hat Red Hat Enterprise Linux 7 Extended Lifecycle Support
  • Red Hat Red Hat Enterprise Linux 6

Classification

Weakness

References

Sources

Fencer Vulns 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.

CPEs and fixed versions use Anchore's correction of NVD's data: Added CPE configurations because not yet analyzed by NVD.