CVE-2026-46521: ImageMagick: Heap Buffer Over-Write in MIFF encoder when using LZMA compression

May 18, 2026

When using LZMA compression in the MIFF encoder an out of bounds write can occur due to a missing check.

References

github.com/ImageMagick/ImageMagick/security/advisories/GHSA-jcqp-6r6f-3mfx
github.com/advisories/GHSA-jcqp-6r6f-3mfx
nvd.nist.gov/vuln/detail/CVE-2026-46521

Code Behaviors & Features

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