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CVE-2026-62946 — Magick.NET-Q16-AnyCPU

MEDIUM

CVE-2026-62946 is a medium-severity (CVSS 5.1) CWE-190 vulnerability in Magick.NET-Q16-AnyCPU. A fix is available for Magick.NET-Q16-AnyCPU — see the affected versions and patch details below.

ImageMagick: Integer Overflow in JNX decoder causes heap buffer over-write when processing extremly large files on 32-bit builds

Also known asGHSA-h22j-f9xw-xjjm
Published
Updated
Affected
6 pkgs
Patched
6 / 6
Exploits
None indexed
Exploitation data as of Oct 23, 2026 · OSV.dev, NVD, FIRST.org (EPSS)

Exploitation Status

No confirmed exploitation observed yet

  • CISA’s own triage has not observed active exploitation or public proof-of-concept code for this CVE as of its last assessment.

Exploitation and automatability from CISA’s SSVC triage for CVE-2026-62946.

EPSS Exploitation Probability

via FIRST.org ↗
0.1%probability of exploitation in next 30 days
Lower Risk0.00%
Lower risk than most CVEs2th percentile — riskier than 2% of all scored CVEsHighest risk
0.00%0.21%0.42%0.63%0.1%0.1%0.1%0.1%Aug 26Oct 26Oct 26

Probability of exploitation in the next 30 days, from FIRST.org EPSS.

How urgent is this, really

CVE-2026-62946 by exploitation likelihood (EPSS) against impact (CVSS). Outside the shaded patch-first corner.

Where this sits among everything scored

Of 395,249 CVEs with a current EPSS score, this one falls in the < 10% band (highlighted). Counts from FIRST.org, log-scaled.

Real-World Exposure

6 pkgs affected
.NETMagick.NET-Q16-AnyCPU.NETMagick.NET-Q16-HDRI-AnyCPU.NETMagick.NET-Q16-HDRI-x86.NETMagick.NET-Q16-x86.NETMagick.NET-Q8-AnyCPU.NETMagick.NET-Q8-x86

Real-time download stats are indexed for npm and PyPI packages. This vulnerability affects NuGet packages — download data is not available via public APIs for these ecosystems.

Description

ImageMagick is free and open-source software used for editing and manipulating digital images. In versions prior to both 6.9.13-52 and 7.1.2-27, processing an extremely large JNX file on 32-bit platforms can cause an integer overflow, leading to a heap buffer over-write. This issue has been fixed in versions 6.9.13-52 and 7.1.2-27.

Affected Packages

6 total 6 fixed
EcosystemPackageVulnerable rangeFix
.NETNuGetMagick.NET-Q16-AnyCPUall versions14.15.0dotnet add package Magick.NET-Q16-AnyCPU --version 14.15.0
.NETNuGetMagick.NET-Q16-HDRI-AnyCPUall versions14.15.0dotnet add package Magick.NET-Q16-HDRI-AnyCPU --version 14.15.0
.NETNuGetMagick.NET-Q16-HDRI-x86all versions14.15.0dotnet add package Magick.NET-Q16-HDRI-x86 --version 14.15.0
.NETNuGetMagick.NET-Q16-x86all versions14.15.0dotnet add package Magick.NET-Q16-x86 --version 14.15.0
.NETNuGetMagick.NET-Q8-AnyCPUall versions14.15.0dotnet add package Magick.NET-Q8-AnyCPU --version 14.15.0
.NETNuGetMagick.NET-Q8-x86all versions14.15.0dotnet add package Magick.NET-Q8-x86 --version 14.15.0

Affected Products

1 product · 2 configurations
Application
imagemagickimagemagick
≥ 7.0.0-0 && < 7.1.2-27
range

Detection & mitigation playbook

Open-source dependency

  1. Detect

    Scan your dependency tree (package-lock.json, pnpm-lock.yaml, requirements.txt, go.sum, etc.) for Magick.NET-Q16-AnyCPU, including transitive dependencies — a direct dependency you never call can still pull in a vulnerable version.

  2. Fix

    Update Magick.NET-Q16-AnyCPU to 14.15.0 or later, then make sure no transitive (indirect) dependency still pins the vulnerable range — O3 confirms CVE-2026-62946 is resolved across your whole dependency graph.

  3. Workarounds

    Stop feeding it untrusted input: reject or quarantine files and payloads from unverified sources until you can upgrade, restrict accepted formats to the ones you actually need, and run the parsing or decoding step in a least-privileged sandbox or short-lived worker so a crash or corrupted read cannot reach the rest of the process.

Fixing This On Your OS

If you run this on a Linux distribution, patch through your package manager against the distro's own security advisory below — it tracks the exact backported fix for your release, which can ship on a different timeline (and sometimes a different severity) than the upstream project.

Red HatModerate

This Moderate impact flaw in ImageMagick affects 32-bit systems, where processing an exceptionally large JNX image file can trigger an integer overflow. This leads to a heap buffer overwrite, causing a denial of service. The vulnerability requires local access and has high attack complexity, limiting its broader…

Workaround published by Red Hat
To mitigate this issue, avoid processing untrusted JNX image files with ImageMagick on 32-bit systems. Restricting ImageMagick's exposure to untrusted or excessively large JNX files can reduce the risk of a denial of service.
Source: Red Hat security advisory for CVE-2026-62946 (CC BY 4.0)
UbuntuMEDIUM
USN-8739-1UbuntuUSN-8739-2Ubuntu

Frequently Asked Questions

ImageMagick is free and open-source software used for editing and manipulating digital images. In versions prior to both 6.9.13-52 and 7.1.2-27, processing an extremely large JNX file on 32-bit platforms can cause an integer overflow, leading to a heap buffer over-write. This issue has been fixed in versions 6.9.13-52 and 7.1.2-27.
O3 Security · Impact-Aware SCA

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CVE-2026-62946: Magick.NET-Q16 — Fixed in 14.15.0