CVE-2026-33901: ImageMagick has a Heap Buffer Overflow via MVG decoder

Severity: high (CVSS 7.5 v3.1)
Exploited in the wild: not listed in CISA KEV
EPSS: 0.8% probability of exploitation in the next 30 days
Public exploit or detection template: none known
Published: 2026-04-13 · updated 2026-07-15
Weakness: CWE-122

Description

ImageMagick is free and open-source software used for editing and manipulating digital images. In versions below both 7.1.2-19 and 6.9.13-44, a heap buffer overflow occurs in the MVG decoder that could result in an out of bounds write when processing a crafted image. This issue has been fixed in versions 6.9.13-44 and 7.1.2-19.

Affected products

ImageMagick: before 6.9.13-44; from 7.0.0-0 before 7.1.2-19 — fixed in 6.9.13-44, 7.1.2-19

How to fix

Upgrade to a fixed version: ImageMagick 6.9.13-44, 7.1.2-19. Check the vendor advisory for mitigations.

References

https://github.com/ImageMagick/ImageMagick/commit/4c72003e9e54a4ebaa938d239e75f5d285527ebe
https://github.com/ImageMagick/ImageMagick/security/advisories/GHSA-x9h5-r9v2-vcww
https://github.com/dlemstra/Magick.NET/releases/tag/14.12.0
https://access.redhat.com/security/cve/CVE-2026-33901
https://bugzilla.redhat.com/show_bug.cgi?id=2458023
https://security.access.redhat.com/data/csaf/v2/vex/2026/cve-2026-33901.json

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