CVE-2026-62946 ImageMagick: Integer Overflow in JNX decoder causes heap buffer over-write when processing extremly large files on 32-bit builds

What is CVE-2026-62946?

CVE-2026-62946 is a medium-severity vulnerability in Imagemagick Imagemagick, published on 30 Jul 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. In versions prior to both 6.9.13-52 and 7.1.2-27, processing an extremely large JNX file on 32-bit platforms can cause an integer overflow, leading to a heap buffer over-write. This issue has been fixed in versions 6.9.13-52 and 7.1.2-27.

Weakness: CWE-190

Which versions are affected by CVE-2026-62946?

12 open source packages ship an affected version, including Magick.NET-Q16-AnyCPU, Magick.NET-Q16-HDRI-AnyCPU and Magick.NET-Q16-HDRI-x86. It affects 1 product.

Products include Imagemagick Imagemagick.

How do I fix CVE-2026-62946?

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

Is CVE-2026-62946 being exploited?

There is no known exploitation of CVE-2026-62946 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-2026-62946, ECHO-f007-0d0a-0b78, GHSA-h22j-f9xw-xjjm, JLSEC-2026-1081, MINI-fv44-g9r7-h6v8, ROOT-OS-DEBIAN-13-CVE-2026-62946 and 1 more.