Out-of-bounds read in ImageMagick - CVE-2026-56378
Published: February 25, 2026 / Updated: September 14, 2026
Vulnerability identifier: #VU123260
CSH Severity: Medium
CVSS v4: 6.3 [CVSS:4.0/AV:N/AC:L/AT:P/PR:N/UI:N/VC:L/VI:N/VA:N/SC:N/SI:N/SA:N]
CVE-ID: CVE-2026-56378
CWE-ID: CWE-125
Exploitation vector: Remote access
Exploit availability:
No public exploit available
Vulnerability details
The vulnerability allows a remote attacker to gain access to potentially sensitive information.
The vulnerability exists due to a boundary condition in the PCD coder’s DecodeImage loop. A remote attacker can trigger an out-of-bounds read error and read contents of memory on the system.
Affected software
ImageMagick
Debian Linux
imagemagick (Debian package)
Debian Linux
imagemagick (Debian package)
How to mitigate CVE-2026-56378
Install updates from vendor's website.
ImageMagick - addressed in versions 6.9.13-40, 7.1.2-15
imagemagick (Debian package) - update to 8:7.1.1.43+dfsg1-1+deb13u11
imagemagick (Debian package) - update to 8:7.1.1.43+dfsg1-1+deb13u11