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Advisory record · GHSA-jvgr-9ph5-m8v4

ImageMagick has a heap buffer overflow when encoding JXL image with a 16-bit float

CVSS 5.5 MediumEPSS 0.0019 · 8th percentile

Published by the GitHub Advisory Database at 14 Apr 2026, 18:50 UTC. agentprime has not analysed this yet, so whether it affects any app is not known.

PackageEcosystemAffectedFixed in
Magick.NET-Q16-AnyCPUNuGet<14.12.014.12.0
Magick.NET-Q16-HDRI-AnyCPUNuGet<14.12.014.12.0
Magick.NET-Q16-HDRI-OpenMP-arm64NuGet<14.12.014.12.0
Magick.NET-Q16-HDRI-arm64NuGet<14.12.014.12.0
Magick.NET-Q16-HDRI-x64NuGet<14.12.014.12.0
Magick.NET-Q16-HDRI-x86NuGet<14.12.014.12.0
Magick.NET-Q16-OpenMP-arm64NuGet<14.12.014.12.0
Magick.NET-Q16-OpenMP-x64NuGet<14.12.014.12.0
Magick.NET-Q16-arm64NuGet<14.12.014.12.0
Magick.NET-Q16-x64NuGet<14.12.014.12.0
Magick.NET-Q16-x86NuGet<14.12.014.12.0
Magick.NET-Q8-AnyCPUNuGet<14.12.014.12.0
Magick.NET-Q8-OpenMP-arm64NuGet<14.12.014.12.0
Magick.NET-Q8-OpenMP-x64NuGet<14.12.014.12.0
Magick.NET-Q8-arm64NuGet<14.12.014.12.0
Magick.NET-Q8-x64NuGet<14.12.014.12.0
Magick.NET-Q8-x86NuGet<14.12.014.12.0
Identifiers
GHSA-jvgr-9ph5-m8v4 · CVE-2026-40183
Weakness (CWE)
CWE-122
Tags
Published
14 Apr 2026
Updated
10 Sept 2026

Machine-written summary

Summary written by Claude Haiku from the source advisory. Not reviewed by a person.

Magick.NET packages before 14.12.0 contain a heap write overflow in the JXL encoder when an image is encoded as 16-bit floats. The source gives few details about what an attacker must do to trigger it. Upgrade to version 14.12.0 or later.

Written 9 Nov 2026.

Not analysed yet

We haven’t published our analysis of this Advisory yet. Once a person has reviewed it, this page will say what’s vulnerable, what has to be true for your app to be affected, and how to check.

Severity and exploitation

ScoreRatingCVSSVectorSource
5.5 Medium 3.1 CVSS:3.1/AV:L/AC:L/PR:N/UI:R/S:U/C:N/I:N/A:H CNA (GitHub_M)
  • CISA KEV Not listed.
  • EPSS 0.0019, the 8th percentile, on 9 Nov 2026: FIRST’s estimate of the chance of exploitation in the next 30 days.

Timeline

  1. 31 Oct 2026, 15:21 UTC First seen by agentprime
  2. 31 Oct 2026, 15:21 UTC Confirmed by OSV

Sources

Facts on this page come from the GitHub Advisory Database (CC-BY 4.0), OSV and the other sources listed, as published. We don’t reproduce full advisory descriptions, which can contain exploit code.