Out-of-bounds write in ImageMagick - CVE-2026-55597

Vulnerability identifier: #VU135667

CSH Severity: Medium

CVSS v4: 6.7 [CVSS:4.0/AV:L/AC:L/AT:N/PR:N/UI:A/VC:N/VI:N/VA:H/SC:N/SI:N/SA:N]

CVE-ID: CVE-2026-55597

CWE-ID: CWE-787

Exploitation vector: Remote access

Exploit availability: No public exploit available

The vulnerability allows a remote attacker to cause a denial of service.

The vulnerability exists due to out-of-bounds write in the JP2 encoder when parsing a crafted JP2 file. A remote attacker can trick the victim into opening a crafted file to cause a denial of service.

User interaction is required to open a crafted file.

ImageMagick
openEuler
ImageMagick-debugsource
ImageMagick-help
ImageMagick-perl
ImageMagick-devel
ImageMagick-debuginfo
ImageMagick-c++-devel
ImageMagick-c++
ImageMagick

Install security update from vendor's website.

ImageMagick - update to 7.1.2-26
ImageMagick-debugsource - update to 7.1.2.26-1
ImageMagick-help - update to 7.1.2.26-1
ImageMagick-perl - update to 7.1.2.26-1
ImageMagick-devel - update to 7.1.2.26-1
ImageMagick-debuginfo - update to 7.1.2.26-1
ImageMagick-c++-devel - update to 7.1.2.26-1
ImageMagick-c++ - update to 7.1.2.26-1
ImageMagick - update to 7.1.2.26-1

• https://github.com/ImageMagick/ImageMagick/security/advisories/GHSA-c4v7-w88g-m6c4

• Multiple vulnerabilities in ImageMagick
• openEuler 24.03 LTS SP3 update for ImageMagick
• openEuler 24.03 LTS SP1 update for ImageMagick
• openEuler 22.03 LTS SP4 update for ImageMagick