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MEDIUM severity

CVE-2026-34238 — Magick.NET-Q16-AnyCPU

MEDIUMFix: ImageMagick/ImageMagick@bcd8519

CVE-2026-34238 is a medium-severity (CVSS 5.1) remote code execution 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 despeckle operation causes heap buffer overflow on 32-bit builds

Also known asGHSA-26qp-ffjh-2x4v
Published
Apr 13, 2026
Updated
Aug 12, 2026
Affected
6 pkgs
Patched
6 / 6
Exploits
None indexed
Exploitation data as of Sep 26, 2026 · OSV.dev, 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-2026-34238.

EPSS Exploitation Probability

via FIRST.org ↗
0.1%probability of exploitation in next 30 days
Lower Risk0.00%
Lower risk than most CVEs3th percentile — riskier than 3% of all scored CVEsHighest risk

EPSS (Exploit Prediction Scoring System) is a daily probability model maintained by FIRST.org. It estimates the likelihood a CVE will be exploited in production environments within the next 30 days, derived from real-world threat intelligence signals.

How urgent is this, really

CVE-2026-34238 plotted by exploitation likelihood (EPSS) against impact (CVSS). The shaded corner — EPSS 50%+ and CVSS 7.0+ — is where this CVE doesn't sit, though severity or exploitability alone can still warrant action.

Where this sits among everything scored

Of 379,842 CVEs with a current EPSS score, this one falls in the < 10% band (highlighted). Real counts from FIRST.org, not a sample — log-scaled since the landscape is heavily right-skewed.

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 below both 7.1.2-19 and 6.9.13-44, an integer overflow in the despeckle operation causes a heap buffer overflow on 32-bit builds that will result in an out of bounds write. This issue has been fixed in versions 6.9.13-44 and 7.1.2-19.

Affected Packages

6 total 6 fixed
EcosystemPackageVulnerable rangeFix
.NETNuGetMagick.NET-Q16-AnyCPUall versions14.12.0dotnet add package Magick.NET-Q16-AnyCPU --version 14.12.0
.NETNuGetMagick.NET-Q16-HDRI-AnyCPUall versions14.12.0dotnet add package Magick.NET-Q16-HDRI-AnyCPU --version 14.12.0
.NETNuGetMagick.NET-Q16-HDRI-x86all versions14.12.0dotnet add package Magick.NET-Q16-HDRI-x86 --version 14.12.0
.NETNuGetMagick.NET-Q16-x86all versions14.12.0dotnet add package Magick.NET-Q16-x86 --version 14.12.0
.NETNuGetMagick.NET-Q8-AnyCPUall versions14.12.0dotnet add package Magick.NET-Q8-AnyCPU --version 14.12.0
.NETNuGetMagick.NET-Q8-x86all versions14.12.0dotnet add package Magick.NET-Q8-x86 --version 14.12.0

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 14.12.0 or later, then make sure no transitive (indirect) dependency still pins the vulnerable range — O3 confirms CVE-2026-34238 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.

  4. How O3 protects you

    O3 Security's impact-aware SCA analyses which vulnerable code paths your application actually calls, so a match like CVE-2026-34238 can be triaged on real exposure rather than presence alone.

Tailored to CVE-2026-34238. Runtime protection reduces exposure until a permanent patch is applied and verified — it complements patching, it doesn't replace it.

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
Workaround published by Red Hat
Mitigation for this issue is either not available or the currently available options do not meet the Red Hat Product Security criteria comprising ease of use and deployment, applicability to widespread installation base or stability.
Source: Red Hat security advisory for CVE-2026-34238 (CC BY 4.0)
UbuntuMEDIUM
USN-8810-1Ubuntu

Frequently Asked Questions

ImageMagick is free and open-source software used for editing and manipulating digital images. In versions below both 7.1.2-19 and 6.9.13-44, an integer overflow in the despeckle operation causes a heap buffer overflow on 32-bit builds that will result in an out of bounds write. This issue has been fixed in versions 6.9.13-44 and 7.1.2-19.
O3 Security · Impact-Aware SCA

Is CVE-2026-34238 in your dependencies?

O3 Security finds CVE-2026-34238 across NuGet dependencies, including transitive ones, and its impact-aware SCA ranks findings by whether your code actually calls the vulnerable path.

Scan my dependencies How O3 SCA works