CVE-2026-25637 ImageMagick: Possible memory leak in ASHLAR encoder

What is CVE-2026-25637?

CVE-2026-25637 is a medium-severity denial of service vulnerability in Imagemagick Imagemagick, published on 24 Feb 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 version 7.1.2-15, a memory leak in the ASHLAR image writer allows an attacker to exhaust process memory by providing a crafted image that results in small objects that are allocated but never freed. Version 7.1.2-15 contains a patch.

Weakness: CWE-401

Which versions are affected by CVE-2026-25637?

38 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 2 products.

Products include Dlemstra Magick.net, Imagemagick Imagemagick.

How do I fix CVE-2026-25637?

Upgrade Magick.NET-Q16-AnyCPU to 14.10.3 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-2026-25637 being exploited?

There is no known exploitation of CVE-2026-25637 in the wild and no public exploit code.

Other vulnerabilities in Imagemagick Imagemagick

• CVE-2026-24485 ImageMagick: Infinite loop vulnerability when parsing a PCD file High 7.5
• CVE-2026-23952 ImageMagick has a NULL pointer dereference in MSL parser via <comment> tag before image load Medium 6.5
• CVE-2026-24484 ImageMagick: Converting multi-layer nested MVG to SVG can cause DoS Medium 5.3
• CVE-2026-25576 ImageMagick: Out of bounds read in multiple coders read raw pixel data Medium 5.1
• CVE-2026-27798 ImageMagick: Heap Buffer Over-read in WaveletDenoise when processing small images Medium 4.0

All Imagemagick Imagemagick vulnerabilities

Sources

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

Also known as DEBIAN-CVE-2026-25637, ECHO-39eb-c4a0-66cb, GHSA-gm37-qx7w-p258, JLSEC-2026-942, MINI-v3wg-xc33-gff7, UBUNTU-CVE-2026-25637.