CVE-2026-46520 ImageMagick: Heap Buffer Over-Write in IPL decoder when reading multiple images of different dimensions

What is CVE-2026-46520?

CVE-2026-46520 is a high-severity memory corruption vulnerability in Imagemagick Imagemagick, published on 10 Jun 2026. An attacker can exploit it over the internet without logging in, 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 6.9.13-48 and 7.1.2-23, when reading multiple images with different dimensions an out of bounds heap write can occur. This issue has been patched in versions 6.9.13-48 and 7.1.2-23.

Weakness: CWE-787, CWE-122

Which versions are affected by CVE-2026-46520?

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-2026-46520?

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

Upgrade to the fixed version. Memory-safe languages, compiler hardening and fuzzing prevent most new cases. More about Memory corruption.

Is CVE-2026-46520 being exploited?

There is no known exploitation of CVE-2026-46520 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-2026-46520, ECHO-a791-a6e2-27df, GHSA-36wm-hprc-mcf5, JLSEC-2026-1012, MINI-3ff5-j2hg-x3ph, UBUNTU-CVE-2026-46520.