CVE-2026-46523 ImageMagick: Use-After-Free in MSL decoder.

What is CVE-2026-46523?

CVE-2026-46523 is a medium-severity use after free vulnerability in Imagemagick Imagemagick, published on 10 Jun 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. Prior to versions 7.1.2.23 and 6.9.13-48, a crafted MSL image can trigger a heap-use-after-free. Versions 7.1.2.23 and 6.9.13-48 fix the issue.

Weakness: CWE-825, CWE-416

Which versions are affected by CVE-2026-46523?

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-2026-46523?

Upgrade Magick.NET-Q16-AnyCPU to 14.13.1 or later.

Upgrade to the fixed version. These bugs are found with fuzzing and sanitisers and avoided by memory-safe languages. More about Use after free.

Is CVE-2026-46523 being exploited?

There is no known exploitation of CVE-2026-46523 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 CLSA-2026-1783340363, DEBIAN-CVE-2026-46523, ECHO-53bc-50e8-6efb, GHSA-5r4x-w6p5-222q, JLSEC-2026-1015, MGASA-2026-0282 and 5 more.