Heap Buffer Underwrite Vulnerability in ImageMagick from Open Source Vendor
CVE-2026-109964

6.3MEDIUM

Key Information:

Vendor

Imagemagick
Status
Imagemagick
Vendor
CVE Published:
13 October 2026

What is CVE-2026-109964?

An exploit exists in the ImageMagick product prior to version 7.1.2-33 and 6.9.13-58 that allows attackers to manipulate a crafted PICT file. By performing pointer arithmetic, a crafted PICT can bypass bounds checks, allowing a buffer underwrite condition. This may lead to unauthorized data manipulation, application crashes, or remote code execution due to the ability to write up to 128 bytes of controlled data below the heap buffer. ImageMagick users are advised to upgrade to the latest version to mitigate this vulnerability.

Affected Version(s)

ImageMagick 7.0.0-0 < 7.1.2-33

ImageMagick 0 < 6.9.13-58

References

https://github.com/ImageMagick/ImageMagick/security/advis...
vendor-advisory
https://github.com/ImageMagick/ImageMagick/commit/63dde0c...
patch
https://github.com/ImageMagick/ImageMagick6/commit/c18c5d...
patch

CVSS V4

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

Timeline

  • Vulnerability published

  • Vulnerability Reserved

Credit

idoprog
.