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CVE-2026-26283: ImageMagick has possible infinite loop in JPEG encoder when using `jpeg:extent`

Description

ImageMagick is free and open-source software used for editing and manipulating digital images. Prior to versions 7.1.2-15 and 6.9.13-40, a `continue` statement in the JPEG extent binary search loop in the jpeg encoder causes an infinite loop when writing persistently fails. An attacker can trigger a 100% CPU consumption and process hang (Denial of Service) with a crafted image. Versions 7.1.2-15 and 6.9.13-40 contain a patch.

Affected products

How to fix

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

References

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