CVE-2026-28686 ImageMagick has a write heap-buffer-overflow in PCL encoder via undersized output buffer

What is CVE-2026-28686?

CVE-2026-28686 is a medium-severity memory corruption 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 heap-buffer-overflow vulnerability exists in the PCL encode due to an undersized output buffer allocation. This vulnerability is fixed in 7.1.2-16 and 6.9.13-41.

Weakness: CWE-131, CWE-122

Which versions are affected by CVE-2026-28686?

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-2026-28686?

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

Upgrade to the fixed version. Memory-safe languages, compiler hardening and fuzzing prevent most new cases. More about Memory corruption.

Is CVE-2026-28686 being exploited?

There is no known exploitation of CVE-2026-28686 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-2026-28686, ECHO-9fe9-3ff1-c43a, GHSA-467j-76j7-5885, JLSEC-2026-974, MINI-fhrv-c855-x7wc, UBUNTU-CVE-2026-28686.