CVE-2026-23874 ImageMagick's MSL: Stack overflow via infinite recursion in ProcessMSLScript

What is CVE-2026-23874?

CVE-2026-23874 is a medium-severity denial of service vulnerability in Imagemagick Imagemagick, published on 20 Jan 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. Versions prior to 7.1.2-13 have a stack overflow via infinite recursion in MSL (Magick Scripting Language) `<write>` command when writing to MSL format. Version 7.1.2-13 fixes the issue.

Weakness: CWE-835

Which versions are affected by CVE-2026-23874?

36 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-2026-23874?

Upgrade Magick.NET-Q16-AnyCPU to 14.10.2 or later.

Upgrade, then put limits on request size, rate and nesting depth so one client cannot exhaust the service. More about Denial of service.

Is CVE-2026-23874 being exploited?

It is not confirmed as exploited in the wild, but public exploit code for CVE-2026-23874 exists.

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-2026-23874, ECHO-b019-22d4-4ae0, GHSA-9vj4-wc7r-p844, JLSEC-2026-935, MINI-rc7g-8mfp-3mv8, UBUNTU-CVE-2026-23874.