CVE-2026-26283 ImageMagick has possible infinite loop in JPEG encoder when using `jpeg:extent`

What is CVE-2026-26283?

CVE-2026-26283 is a medium-severity denial of service vulnerability in Imagemagick Imagemagick, published on 24 Feb 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 7.1.2-15 and 6.9.13-40, a `continue` statement in the JPEG extent binary search loop in the jpeg encoder causes an infinite loop when writing persistently fails. An attacker can trigger a 100% CPU consumption and process hang (Denial of Service) with a crafted image. Versions 7.1.2-15 and 6.9.13-40 contain a patch.

Weakness: CWE-835

Which versions are affected by CVE-2026-26283?

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 1 product.

Products include Imagemagick Imagemagick.

How do I fix CVE-2026-26283?

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-2026-26283 being exploited?

There is no known exploitation of CVE-2026-26283 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-2026-26283, ECHO-1291-4784-c718, GHSA-gwr3-x37h-h84v, JLSEC-2026-967, MINI-m2c3-xq84-j7wx, UBUNTU-CVE-2026-26283.