Memory Leak Vulnerability in ImageMagick Products by ImageMagick
CVE-2026-86421

6.3MEDIUM

Key Information:

Vendor

Imagemagick
Status
Imagemagick
Vendor
CVE Published:
7 September 2026

What is CVE-2026-86421?

ImageMagick versions prior to 7.1.2-30 and 6.9.13-55 exhibit a memory leak issue in the MSL image decoder. This vulnerability allows for continuous memory allocation without adequate deallocation when processing specially crafted MSL images, which can lead to significant memory exhaustion and potentially result in a denial of service. Users and administrators are urged to upgrade to the latest versions of ImageMagick to mitigate these risks.

Affected Version(s)

ImageMagick 0 < 7.1.2-30

ImageMagick 0 < 6.9.13-55

ImageMagick 7.1.2-30

References

https://github.com/ImageMagick/ImageMagick/security/advis...
vendor-advisory
https://www.vulncheck.com/advisories/imagemagick-before-7...
third-party-advisory

CVSS V4

Score:
6.3
Severity:
MEDIUM
Confidentiality:
None
Integrity:
None
Availability:
Low
Attack Vector:
Network
Attack Complexity:
High
Attack Required:
Physical
Privileges Required:
Undefined
User Interaction:
None

Timeline

  • Vulnerability published

  • Vulnerability Reserved

Credit

Yanhaoxi
.