CVE-2026-28691 ImageMagick has an uninitialized pointer dereference in JBIG decoder

What is CVE-2026-28691?

CVE-2026-28691 is a high-severity vulnerability in Imagemagick Imagemagick, published on 9 Mar 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 7.1.2-16 and 6.9.13-41, an uninitialized pointer dereference vulnerability exists in the JBIG decoder due to a missing check. This vulnerability is fixed in 7.1.2-16 and 6.9.13-41.

Weakness: CWE-824, CWE-252

Which versions are affected by CVE-2026-28691?

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-2026-28691?

Upgrade Magick.NET-Q16-AnyCPU to 14.10.4 or later.

Is CVE-2026-28691 being exploited?

There is no known exploitation of CVE-2026-28691 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-2026-1783524573, DEBIAN-CVE-2026-28691, ECHO-ac93-44c4-4dc8, GHSA-wj8w-pjxf-9g4f, JLSEC-2026-979, MINI-h97g-m269-hcgq and 1 more.