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CVE-2026-40183

ImageMagick: Heap buffer overflow when encoding JXL image with a 16-bit float

Published: 4/13/2026 Last updated: 4/14/2026 Reserved: 4/9/2026

ImageMagick is free and open-source software used for editing and manipulating digital images. In versions below 7.1.2-19, the JXL encoder has an heap write overflow when a user specifies that the image should be encoded as 16 bit floats. This issue has been fixed in version 7.1.2-19.

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 (1)

Product Vendor Version
ImageMagick ImageMagick n/a

References (3)