What’s Vulnerable › Vulnerabilities

CVE-2026-56378: ImageMagick - Heap Out-of-Bounds Read in PCD Decoder

• Severity: high (CVSS 8.2 v3.1)
• Exploited in the wild: not listed in CISA KEV
• EPSS: 0.4% probability of exploitation in the next 30 days
• Public exploit or detection template: none known
• Published: 2026-06-21 · updated 2026-10-29
• Weakness: CWE-125

Description

ImageMagick before 7.1.2-15 (and 6.x before 6.9.13-40) contains a heap out-of-bounds read in the PCD coder's DecodeImage loop. A crafted PCD file can trigger a one-byte heap out-of-bounds read during image decoding, resulting in denial of service and potential disclosure of an adjacent heap byte.

Affected products

• ImageMagick: from 6.9.0-0 before 6.9.13-40; from 7.1.2-0 before 7.1.2-15 — fixed in 6.9.13-40, 7.1.2-15
• ImageMagick: from 7.0.0 before 7.1.2-15 — fixed in 7.1.2-15

How to fix

Upgrade to a fixed version: ImageMagick 6.9.13-40, 7.1.2-15; ImageMagick 7.1.2-15. Check the vendor advisory for mitigations.

References

• https://github.com/ImageMagick/ImageMagick/security/advisories/GHSA-wgxp-q8xq-wpp9
• https://www.vulncheck.com/advisories/imagemagick-heap-out-of-bounds-read-in-pcd-decoder

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