CVE-2026-40312 ImageMagick: Off-by-One in MSL decoder could result in crash

What is CVE-2026-40312?

CVE-2026-40312 is a medium-severity vulnerability in Imagemagick Imagemagick, published on 13 Apr 2026. It can only be exploited from the same machine or local network, with no action from the victim.

Official description

ImageMagick is free and open-source software used for editing and manipulating digital images. In versions below 7.1.2-19, an off by one error in the MSL decoder could result in a crash when a malicous MSL file is read. This issue has been fixed in version 7.1.2-19.

Weakness: CWE-193

Which versions are affected by CVE-2026-40312?

34 open source packages ship an affected version, including Magick.NET-Q16-AnyCPU, Magick.NET-Q16-HDRI-AnyCPU and Magick.NET-Q16-HDRI-OpenMP-arm64. It affects 1 product.

Products include Imagemagick Imagemagick.

How do I fix CVE-2026-40312?

Upgrade Magick.NET-Q16-AnyCPU to 14.12.0 or later.

Is CVE-2026-40312 being exploited?

There is no known exploitation of CVE-2026-40312 in the wild and no public exploit code.

Other vulnerabilities in Imagemagick Imagemagick

• CVE-2019-19952 Use after free in n/a Critical 9.8
• CVE-2018-16328 Null dereference in n/a Critical 9.8
• CVE-2018-16329 Null dereference in n/a Critical 9.8
• CVE-2017-18210 Null dereference in n/a Critical 9.8
• CVE-2017-14138 Denial of service in n/a Critical 9.8

All Imagemagick Imagemagick vulnerabilities

Sources

• CVE record
• NVD
• OSV
• GitHub advisory
• How this page is made

Also known as DEBIAN-CVE-2026-40312, ECHO-1d9e-4cd3-3b9e, GHSA-5xg3-585r-9jh5, JLSEC-2026-1004, MINI-7736-vx67-4438, UBUNTU-CVE-2026-40312.