CVE-2026-56369 ImageMagick - Information Disclosure via AES-CTR Nonce Reuse in PasskeyEncipherImage

What is CVE-2026-56369?

CVE-2026-56369 is a medium-severity vulnerability in Imagemagick Imagemagick, published on 30 Jun 2026. An attacker can exploit it over the internet without logging in, with no action from the victim.

Official description

ImageMagick before 7.1.2-22 contains an information disclosure vulnerability in the PasskeyEncipherImage method due to AES-CTR nonce reuse. Attackers can exploit nonce reuse in the cipher implementation to recover plaintext information from encrypted images.

Weakness: CWE-323

Which versions are affected by CVE-2026-56369?

34 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-2026-56369?

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

Is CVE-2026-56369 being exploited?

There is no known exploitation of CVE-2026-56369 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
• GitHub advisory
• How this page is made

Also known as ECHO-52dd-1135-f406, GHSA-qv2q-c278-pch5, GHSA-vgqj-4jhr-3wh5, JLSEC-2026-1050, MINI-fcgc-49fx-9jvj, UBUNTU-CVE-2026-56369.