ImageMagick up to 6.9.13-43/7.1.2-18 XML File Parser heap-based overflow

Summaryinfo

A vulnerability, which was classified as critical, has been found in ImageMagick up to 6.9.13-43/7.1.2-18. The affected element is an unknown function of the component XML File Parser. This manipulation causes heap-based overflow. This vulnerability appears as CVE-2026-33899. The attack may be initiated remotely. There is no available exploit. It is advisable to upgrade the affected component.

Detailsinfo

A vulnerability was found in ImageMagick up to 6.9.13-43/7.1.2-18. It has been declared as critical. Affected by this vulnerability is an unknown functionality of the component XML File Parser. The manipulation with an unknown input leads to a heap-based overflow vulnerability. The CWE definition for the vulnerability is 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(). As an impact it is known to affect confidentiality, integrity, and availability. The summary by CVE is:

ImageMagick is free and open-source software used for editing and manipulating digital images. In versions below 7.1.2-189 and 6.9.13-44, when `Magick` parses an XML file it is possible that a single zero byte is written out of the bounds. This issue has been fixed in versions 6.9.13-44 and 7.1.2-19.

The advisory is shared at github.com. This vulnerability is known as CVE-2026-33899 since 03/24/2026. The exploitation appears to be easy. The attack can be launched remotely. The exploitation doesn't need any form of authentication. It demands that the victim is doing some kind of user interaction. Neither technical details nor an exploit are publicly available.

The vulnerability scanner Nessus provides a plugin with the ID 310088 (openSUSE 16 Security Update : ImageMagick (openSUSE-SU-2026:20606-1)), which helps to determine the existence of the flaw in a target environment.

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 ae679e2fd19ec656bfab9f822ae4cf06bf91604d 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.

The vulnerability is also documented in the databases at Tenable (310088) and CERT Bund (WID-SEC-2026-1075). If you want to get the best quality for vulnerability data then you always have to consider VulDB.

Affected

• Amazon Linux 2
• SUSE Linux
• SUSE openSUSE
• Open Source ImageMagick

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/

CPE 2.3info

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CPE 2.2info

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If you want to get the best quality for vulnerability data then you always have to consider VulDB.

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