CVE-2026-34238 ImageMagick: Integer overflow in despeckle operation causes heap buffer overflow on 32-bit builds

What is CVE-2026-34238?

CVE-2026-34238 is a medium-severity vulnerability in Imagemagick Imagemagick, published on 13 Apr 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 below both 7.1.2-19 and 6.9.13-44, an integer overflow in the despeckle operation causes a heap buffer overflow on 32-bit builds that will result in an out of bounds write. This issue has been fixed in versions 6.9.13-44 and 7.1.2-19.

Weakness: CWE-787, CWE-190

Which versions are affected by CVE-2026-34238?

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-2026-34238?

Upgrade Magick.NET-Q16-AnyCPU to 14.12.0 or later.

Is CVE-2026-34238 being exploited?

There is no known exploitation of CVE-2026-34238 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-2026-34238, ECHO-1c8b-6a01-2cfe, GHSA-26qp-ffjh-2x4v, JLSEC-2026-999, MINI-9p46-jcxr-vp78, UBUNTU-CVE-2026-34238.