CVE-2026-56367 ImageMagick - Heap Out-of-Bounds Read in PSB RLE Decoding

What is CVE-2026-56367?

CVE-2026-56367 is a medium-severity vulnerability in Imagemagick Imagemagick, published on 21 Jun 2026. An attacker can exploit it over the internet without logging in, with no action from the victim.

Official description

ImageMagick before 7.1.2-15 and 6.9.x before 6.9.13-40 contains an integer overflow in the PSB (PSD v2) RLE decoding path (ReadPSDChannelRLE in coders/psd.c) that causes a heap out-of-bounds read on 32-bit builds. Processing a crafted PSB file can lead to information disclosure or a crash.

Weakness: CWE-125

Which versions are affected by CVE-2026-56367?

It affects 1 product.

Products include Imagemagick Imagemagick.

How do I fix CVE-2026-56367?

Upgrade to a fixed version.

Is CVE-2026-56367 being exploited?

There is no known exploitation of CVE-2026-56367 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 CLSA-2026-1791459583, DEBIAN-CVE-2026-56367, ECHO-0df6-8de2-95bc, GHSA-rg39-4fm5-hrp2, JLSEC-2026-1048, UBUNTU-CVE-2026-56367.