CVE-2026-30937 ImageMagick has a heap buffer overflow in WriteXWDImage due to CARD32 arithmetic overflow in bytes_per_line calculation

What is CVE-2026-30937?

CVE-2026-30937 is a medium-severity vulnerability in Imagemagick Imagemagick, published on 9 Mar 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 7.1.2-16 and 6.9.13-41, a 32-bit unsigned integer overflow in the XWD (X Windows) encoder can cause an undersized heap buffer allocation. When writing a extremely large image an out of bounds heap write can occur. This vulnerability is fixed in 7.1.2-16 and 6.9.13-41.

Weakness: CWE-190, CWE-122

Which versions are affected by CVE-2026-30937?

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-2026-30937?

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

Is CVE-2026-30937 being exploited?

There is no known exploitation of CVE-2026-30937 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-2026-30937, ECHO-2738-aeb3-e4e1, GHSA-qpg4-j99f-8xcg, JLSEC-2026-987, MINI-9m9g-qhfx-v82x, UBUNTU-CVE-2026-30937.