CVE-2026-28691: ImageMagick has an uninitialized pointer dereference in JBIG decoder

Severity: high (CVSS 7.5 v3.1)
Exploited in the wild: not listed in CISA KEV
EPSS: 0.4% probability of exploitation in the next 30 days
Public exploit or detection template: none known
Published: 2026-03-10 · updated 2026-07-15
Weakness: CWE-252

Description

ImageMagick is free and open-source software used for editing and manipulating digital images. Prior to versions 7.1.2-16 and 6.9.13-41, an uninitialized pointer dereference vulnerability exists in the JBIG decoder due to a missing check. This vulnerability is fixed in 7.1.2-16 and 6.9.13-41.

Affected products

ImageMagick: before 6.9.13-41; from 7.0.0-0 before 7.1.2-16 — fixed in 6.9.13-41, 7.1.2-16

How to fix

Upgrade to a fixed version: ImageMagick 6.9.13-41, 7.1.2-16. Check the vendor advisory for mitigations.

References

https://github.com/ImageMagick/ImageMagick/security/advisories/GHSA-wj8w-pjxf-9g4f
https://access.redhat.com/errata/RHSA-2026:6713
https://access.redhat.com/security/cve/CVE-2026-28691
https://bugzilla.redhat.com/show_bug.cgi?id=2445902
https://security.access.redhat.com/data/csaf/v2/vex/2026/cve-2026-28691.json

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