Out-of-bounds write in ImageMagick - CVE-2026-46521
Published: May 18, 2026
Vulnerability identifier: #VU131622
CSH Severity: Medium
CVSS v4.0: 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/E:U/U:Green
CVE-ID: CVE-2026-46521
CWE-ID: CWE-787
Exploitation vector: Remote access
Exploit availability:
No public exploit available
Vendor: ImageMagick.org
Affected software:
ImageMagick
ImageMagick
Detailed vulnerability description
The vulnerability allows a remote attacker to compromise vulnerable system.
The vulnerability exists due to a boundary error in MIFF encoder when using LZMA compression. A remote attacker can trigger an out-of-bounds write and perform a denial of service (DoS) attack on the system.
How to mitigate CVE-2026-46521
Install updates from vendor's website.