ImageMagick: Heap Buffer Over-Write in json and yaml encoder of a single byte due to incorrect fix
Date: 2026-05
Affected: nuget/Magick.NET-Q8-x86, nuget/Magick.NET-Q8-x64, nuget/Magick.NET-Q8-arm64
Attack vector: other
Category: vulnerability-disclosure
Severity: High
CVE: CVE-2026-33899
CVE-2026-33908
CVE-2026-40169
CWE: CWE-122
CWE-191
CWE-193
CWE-674
CVSS: 6.2 (CVSS:3.1/AV:L/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H)

An incorrect fix that was applied in GHSA-5592-p365-24xh could result in a heap buffer over-write of a single byte.


Mitigations:

Architectural layers (MAESTRO):