CVE-2026-55597 ImageMagick: Heap Buffer Over-Write in JP2 encoder when due to incorrect handling of arguments

What is CVE-2026-55597?

CVE-2026-55597 is a medium-severity memory corruption vulnerability in Imagemagick Imagemagick, published on 1 Jul 2026. It can only be exploited from the same machine or local network, and only if a user opens a file or follows a link.

Official description

ImageMagick is free and open-source software used for editing and manipulating digital images. Prior to version 7.1.2-26, an incorrect handling of arguments can cause a heap buffer over-write in the JP2 encoder. This issue has been fixed in version7.1.2-26.

Weakness: CWE-787, CWE-682

Which versions are affected by CVE-2026-55597?

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-2026-55597?

Upgrade Magick.NET-Q16-AnyCPU to 14.15.0 or later.

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

Is CVE-2026-55597 being exploited?

There is no known exploitation of CVE-2026-55597 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-2026-55597, ECHO-0ff4-9fec-7d8e, GHSA-c4v7-w88g-m6c4, JLSEC-2026-1040, MINI-cqwh-rg23-xxxx, UBUNTU-CVE-2026-55597.