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LOW severity

ImageMagick: META reader memory leak in the APP1JPEG input pathGHSA-9r56-3gjq-hqf7

LOW

GHSA-9r56-3gjq-hqf7 is a low-severity (CVSS 3.3) CWE-401 vulnerability in Magick.NET-Q16-AnyCPU. A fix is available for Magick.NET-Q16-AnyCPU — see the affected versions and patch details below.

Also known asCVE-2026-56366
Published
Updated
Affected
18 pkgs
Patched
18 / 18
Exploits
None indexed
Exploitation data as of Nov 5, 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 GHSA-9r56-3gjq-hqf7.

EPSS Exploitation Probability

via FIRST.org ↗
0.2%probability of exploitation in next 30 days
Lower Risk0.00%
Lower risk than most CVEs6th percentile — riskier than 6% of all scored CVEsHighest risk
0.00%0.22%0.45%0.67%0.2%0.2%0.2%0.2%0.2%Aug 26Oct 26Nov 26

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

How urgent is this, really

Where this sits among everything scored

Real-World Exposure

18 pkgs affected
.NETMagick.NET-Q16-AnyCPU.NETMagick.NET-Q16-HDRI-AnyCPU.NETMagick.NET-Q16-HDRI-OpenMP-arm64.NETMagick.NET-Q16-HDRI-arm64.NETMagick.NET-Q16-HDRI-x64.NETMagick.NET-Q16-HDRI-x86.NETMagick.NET-Q16-OpenMP-arm64.NETMagick.NET-Q16-OpenMP-x64+10 more

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 before 7.1.2-18 contains a memory leak vulnerability in the META reader when processing APP1JPEG input paths. Attackers can trigger this memory leak by providing specially crafted APP1JPEG image files, causing denial of service through resource exhaustion.

Affected Packages

18 total 18 fixed
EcosystemPackageVulnerable rangeFix
.NETNuGetMagick.NET-Q16-AnyCPUall versions14.11.1dotnet add package Magick.NET-Q16-AnyCPU --version 14.11.1
.NETNuGetMagick.NET-Q16-HDRI-AnyCPUall versions14.11.1dotnet add package Magick.NET-Q16-HDRI-AnyCPU --version 14.11.1
.NETNuGetMagick.NET-Q16-HDRI-OpenMP-arm64all versions14.11.1dotnet add package Magick.NET-Q16-HDRI-OpenMP-arm64 --version 14.11.1
.NETNuGetMagick.NET-Q16-HDRI-arm64all versions14.11.1dotnet add package Magick.NET-Q16-HDRI-arm64 --version 14.11.1
.NETNuGetMagick.NET-Q16-HDRI-x64all versions14.11.1dotnet add package Magick.NET-Q16-HDRI-x64 --version 14.11.1
.NETNuGetMagick.NET-Q16-HDRI-x86all versions14.11.1dotnet add package Magick.NET-Q16-HDRI-x86 --version 14.11.1

Affected Products

1 product · 2 configurations
Application
imagemagickimagemagick
≥ 7.0.0-0 && < 7.1.2-18
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 14.11.1 or later, then make sure no transitive (indirect) dependency still pins the vulnerable range — O3 confirms GHSA-9r56-3gjq-hqf7 is resolved across your whole dependency graph.

  3. Workarounds

    If you can't upgrade right away: gate or disable the affected feature, validate untrusted input at the boundary, and avoid passing attacker-controlled data into the vulnerable path. O3's runtime protection blocks exploitation in production as an interim safeguard until the upgrade lands.

Frequently Asked Questions

ImageMagick contains a memory leak in the META reader when processing the `APP1JPEG` input path.
O3 Security · Impact-Aware SCA

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