Heap Out-of-Bounds Read Vulnerability in ImageMagick Software
CVE-2026-56378

6.3MEDIUM

Key Information:

Vendor

Imagemagick
Status
Imagemagick
Vendor
CVE Published:
21 June 2026

What is CVE-2026-56378?

ImageMagick versions prior to 7.1.2-15 and 6.x before 6.9.13-40 are susceptible to a heap out-of-bounds read vulnerability found in the PCD coder's DecodeImage loop. By using a specially crafted PCD file, an attacker could leverage this vulnerability to reveal adjacent heap data or potentially disrupt service during image decoding, posing a risk to applications relying on ImageMagick for image processing.

Affected Version(s)

ImageMagick 0 < 7.1.2-15

ImageMagick 0 < 6.9.13-40

ImageMagick 7.1.2-15

References

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

CVSS V4

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

Timeline

  • Vulnerability published

  • Vulnerability Reserved

Credit

ylwango613
.