ImageMagick up to 6.9.13-43/7.1.2-18 JP2 Encoder heap-based overflow

Summaryinfo

A vulnerability described as critical has been identified in ImageMagick up to 6.9.13-43/7.1.2-18. The affected element is an unknown function of the component JP2 Encoder. The manipulation results in heap-based overflow. This vulnerability is cataloged as CVE-2026-40310. The attack may be launched remotely. There is no exploit available. Upgrading the affected component is recommended.

Detailsinfo

A vulnerability classified as critical has been found in ImageMagick up to 6.9.13-43/7.1.2-18. Affected is an unknown code block of the component JP2 Encoder. The manipulation with an unknown input leads to a heap-based overflow vulnerability. CWE is classifying the issue as CWE-122. A heap overflow condition is a buffer overflow, where the buffer that can be overwritten is allocated in the heap portion of memory, generally meaning that the buffer was allocated using a routine such as malloc(). This is going to have an impact on availability. CVE summarizes:

ImageMagick is free and open-source software used for editing and manipulating digital images. Versions below both 7.1.2-19 and 6.9.13-44, contain a heap out-of-bounds write in the JP2 encoder with when a user specifies an invalid sampling index. This issue has been fixed in versions 6.9.13-44 and 7.1.2-19.

The advisory is shared for download at github.com. This vulnerability is traded as CVE-2026-40310 since 04/10/2026. The exploitability is told to be easy. It is possible to launch the attack remotely. The exploitation doesn't require any form of authentication. Successful exploitation requires user interaction by the victim. There are neither technical details nor an exploit publicly available.

Upgrading to version 6.9.13-44 or 7.1.2-19 eliminates this vulnerability. The upgrade is hosted for download at github.com. Applying the patch 3d653bea2df085c728a1c8f775808e1e9249dff9 is able to eliminate this problem. The bugfix is ready for download at github.com. The best possible mitigation is suggested to be upgrading to the latest version.

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Productinfo

Type

• Image Processing Software

Name

• ImageMagick

Version

• 6.9.13-43
• 7.1.2-18

License

• open-source

Website

• Product: https://www.imagemagick.org/

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