What’s Vulnerable › Vulnerabilities

CVE-2026-61866: ImageMagick before 7.1.2-26 Memory Leak in JNG encoder

• Severity: high (CVSS 7.5 v3.1)
• Exploited in the wild: not listed in CISA KEV
• EPSS: 0.2% probability of exploitation in the next 30 days
• Public exploit or detection template: none known
• Published: 2026-07-15 · updated 2026-07-16
• Weakness: CWE-401

Description

ImageMagick before 7.1.2-26 contains a memory leak vulnerability in the JNG encoder when a blob cannot be opened. Attackers can trigger the memory leak by providing malformed JNG files that fail blob operations, causing resource exhaustion.

Affected products

• ImageMagick: before 7.1.2-26 — fixed in 7.1.2-26

How to fix

Upgrade to a fixed version: ImageMagick 7.1.2-26. Check the vendor advisory for mitigations.

References

• https://github.com/ImageMagick/ImageMagick/security/advisories/GHSA-99w9-hv66-rfv7
• https://www.vulncheck.com/advisories/imagemagick-before-26-memory-leak-in-jng-encoder

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