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CVE-2026-46521

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

Published: 6/10/2026 Last updated: 6/11/2026 Reserved: 5/14/2026

ImageMagick is free and open-source software used for editing and manipulating digital images. Prior to versions 6.9.13-48 and 7.1.2-23, when using LZMA compression in the MIFF encoder an out of bounds write can occur due to a missing check. This issue has been patched in versions 6.9.13-48 and 7.1.2-23.

CNA assigner: GitHub_M (a0819718-46f1-4df5-94e2-005712e83aaa) Requested by: n/a

Metrics

Version Score Severity Vector String
3.1 5.5 Medium CVSS:3.1/AV:L/AC:L/PR:N/UI:R/S:U/C:N/I:N/A:H

Opam packages affected (2)

conf-libMagickCore ocsigen-start

Products affected (0)

No product listed.

References (1)