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Back to active CVEs
Medium · CVSS 6.3CVE-2026-56376GHSA-2GQ3-WW97-WFJM

ImageMagick - Heap Use-After-Free in Meta CoderCVE-2026-56376

Answer in brief

CVE-2026-56376 records a Medium severity (CVSS 6.3) vulnerability in ImageMagick - Heap Use-After-Free in Meta Coder. The current sources do not mark it as known exploited. The current feed maps ImageMagick/ImageMagick (generic), ImageMagick/ImageMagick (generic), Magick.NET-Q16-AnyCPU (nuget), Magick.NET-Q16-arm64 (nuget) and additional mapped packages. Check affected ranges and fixed versions before updating.

Analysis pending evidence review

HOL Guard separates source facts from reviewed analysis. See the methodology.

Published Jun 23, 2026Updated Oct 29, 2026Source checked Oct 29, 2026First seen by HOL Jun 23, 2026Material review Oct 29, 2026
Upstream Advisory

Record context

Vulnerability class
Memory Corruption
EPSS
Not reported
CWE IDs
CWE-416
Source
CVE List V5
Source checked
Oct 29, 2026
References
5 linked sources
Open source record

Key facts

Risk
Medium · CVSS 6.3
Exploitation
Not marked as known exploited
Affected software
20 mapped packages or products
Fix availability
Available

Why this deserves its current priority

CVSS is 6.3. The current sources do not mark it as known exploited. Treat this as a source-backed prioritization signal, not a statement about your environment.

Analysis status

Analysis pending evidence review

Factual feed record only; HOL analysis is not approved for indexing. Read the methodology.

Affected scope and exposure questions

The current feed maps ImageMagick/ImageMagick (generic), ImageMagick/ImageMagick (generic), Magick.NET-Q16-AnyCPU (nuget), Magick.NET-Q16-arm64 (nuget) and additional mapped packages. Check affected ranges and fixed versions before updating.

Affected products and reported versions
ProductAffected versionsFixed versions
cpe:2.3:a:imagemagick:imagemagick:*:*:*:*:*:*:*:*Not reportedNot reported
Mapped affected packages and fixed versions
PackageAffected rangeFixed version
ImageMagick/ImageMagickgeneric>=7.0.0 <7.1.2-157.1.2-15
ImageMagick/ImageMagickgeneric>=0 <6.9.13-406.9.13-40
Magick.NET-Q16-AnyCPUnuget<14.10.314.10.3
Magick.NET-Q16-arm64nuget<14.10.314.10.3
Magick.NET-Q16-HDRI-AnyCPUnuget<14.10.314.10.3
Magick.NET-Q16-HDRI-arm64nuget<14.10.314.10.3
Magick.NET-Q16-HDRI-OpenMP-arm64nuget<14.10.314.10.3
Magick.NET-Q16-HDRI-OpenMP-x64nuget<14.10.314.10.3
Magick.NET-Q16-HDRI-x64nuget<14.10.314.10.3
Magick.NET-Q16-HDRI-x86nuget<14.10.314.10.3
Magick.NET-Q16-OpenMP-arm64nuget<14.10.314.10.3
Magick.NET-Q16-OpenMP-x64nuget<14.10.314.10.3
Magick.NET-Q16-OpenMP-x86nuget<14.10.314.10.3
Magick.NET-Q8-AnyCPUnuget<14.10.314.10.3
Magick.NET-Q8-arm64nuget<14.10.314.10.3
Magick.NET-Q8-OpenMP-arm64nuget<14.10.314.10.3
Magick.NET-Q8-OpenMP-x64nuget<14.10.314.10.3
Magick.NET-Q8-x64nuget<14.10.314.10.3
Magick.NET-Q8-x86nuget<14.10.314.10.3

Recommended response

  1. 1Check inventory. Check lockfiles and deployed manifests for ImageMagick/ImageMagick, ImageMagick/ImageMagick, Magick.NET-Q16-AnyCPU.
  2. 2Review the reported fix. Update ImageMagick/ImageMagick to 7.1.2-15; ImageMagick/ImageMagick to 6.9.13-40; Magick.NET-Q16-AnyCPU to 14.10.3; Magick.NET-Q16-arm64 to 14.10.3; Magick.NET-Q16-HDRI-AnyCPU to 14.10.3; Magick.NET-Q16-HDRI-arm64 to 14.10.3; Magick.NET-Q16-HDRI-OpenMP-arm64 to 14.10.3; Magick.NET-Q16-HDRI-OpenMP-x64 to 14.10.3; Magick.NET-Q16-HDRI-x64 to 14.10.3; Magick.NET-Q16-HDRI-x86 to 14.10.3; Magick.NET-Q16-OpenMP-arm64 to 14.10.3; Magick.NET-Q16-OpenMP-x64 to 14.10.3; Magick.NET-Q16-OpenMP-x86 to 14.10.3; Magick.NET-Q8-AnyCPU to 14.10.3; Magick.NET-Q8-arm64 to 14.10.3; Magick.NET-Q8-OpenMP-arm64 to 14.10.3; Magick.NET-Q8-OpenMP-x64 to 14.10.3; Magick.NET-Q8-x64 to 14.10.3; Magick.NET-Q8-x86 to 14.10.3 if you use the affected versions. Test the change in a non-production environment first.

Evidence timeline and material changes

  1. Published upstream

    Jun 23, 2026

    Evidence: source:cvelist:source_dates:source-dates:record

  2. Source modified

    Oct 29, 2026

    Evidence: source:cvelist:source_dates:source-dates:record

  3. First seen by HOL

    Jun 23, 2026

Sources and claim methodology

  • GitHub security advisorygithub.com
  • Source referencevulncheck.com
  • GitHub security advisorygithub.com
  • GitHub security advisorygithub.com
  • NVD vulnerability recordnvd.nist.gov
Upstream source description

ImageMagick before 7.1.2-15 and 6.9.13-40 contains a heap use-after-free in the meta coder: when memory allocation fails, a single byte is written to a stale pointer. Remote attackers can trigger it by processing specially crafted image files, causing a denial of service.

Quoted source text, attributed separately from HOL analysis.