---
id: CVE-2026-56376
title: ImageMagick - Heap Use-After-Free in Meta Coder
summary: >-
  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 …
severity: low
cvss: 3.7
cvssVector: 'CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:N/I:N/A:L'
cvssSource: cna
cwe:
  - CWE-416
vendor: ImageMagick
product: ImageMagick
affected:
  - ImageMagick >= 7.0.0 < 7.1.2-15
  - ImageMagick < 6.9.13-40
ssvc:
  exploitation: none
  automatable: 'no'
  technicalImpact: partial
  timestamp: '2026-06-23T13:06:03.212009Z'
published: '2026-06-23'
updated: '2026-10-29'
sourceUpdated: '2026-10-29T21:15:55.993Z'
source: CVEORG
sourceUrl: 'https://www.cve.org/CVERecord?id=CVE-2026-56376'
references:
  - url: >-
      https://github.com/ImageMagick/ImageMagick/security/advisories/GHSA-2gq3-ww97-wfjm
    label: GitHub Security Advisory (GHSA-2gq3-ww97-wfjm)
  - url: >-
      https://www.vulncheck.com/advisories/imagemagick-heap-use-after-free-in-meta-coder
    label: 'VulnCheck Advisory: ImageMagick - Heap Use-After-Free in Meta Coder'
  - url: >-
      https://github.com/ImageMagick/ImageMagick/commit/f5049954f12c6fcf090a776767526d2a4708d58b
  - url: 'https://nvd.nist.gov/vuln/detail/CVE-2026-56376'
  - url: 'https://github.com/advisories/GHSA-2gq3-ww97-wfjm'
tags:
  - cve.org
  - ghsa
  - nuget
epss: 0.0032
epssPercentile: 0.24976
aliases:
  - GHSA-2gq3-ww97-wfjm
ecosystem: nuget
patched:
  - Magick.NET-Q16-AnyCPU 14.10.3
  - Magick.NET-Q16-HDRI-AnyCPU 14.10.3
  - Magick.NET-Q16-HDRI-OpenMP-arm64 14.10.3
  - Magick.NET-Q16-HDRI-OpenMP-x64 14.10.3
  - Magick.NET-Q16-HDRI-arm64 14.10.3
  - Magick.NET-Q16-HDRI-x64 14.10.3
  - Magick.NET-Q16-HDRI-x86 14.10.3
  - Magick.NET-Q16-OpenMP-arm64 14.10.3
  - Magick.NET-Q16-OpenMP-x64 14.10.3
  - Magick.NET-Q16-OpenMP-x86 14.10.3
  - Magick.NET-Q16-arm64 14.10.3
  - Magick.NET-Q8-AnyCPU 14.10.3
  - Magick.NET-Q8-OpenMP-arm64 14.10.3
  - Magick.NET-Q8-OpenMP-x64 14.10.3
  - Magick.NET-Q8-arm64 14.10.3
  - Magick.NET-Q8-x64 14.10.3
  - Magick.NET-Q8-x86 14.10.3
ingestedAt: '2026-09-24T20:51:40.263Z'
---

## Overview

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.

## Affected

- `ImageMagick >= 7.0.0 < 7.1.2-15`
- `ImageMagick < 6.9.13-40`

## Remediation

Refer to the linked advisories for vendor-supplied fixes and affected version ranges.

## Package advisory (CVE-2026-56376)

Affected packages:

- `Magick.NET-Q16-AnyCPU < 14.10.3`
- `Magick.NET-Q16-HDRI-AnyCPU < 14.10.3`
- `Magick.NET-Q16-HDRI-OpenMP-arm64 < 14.10.3`
- `Magick.NET-Q16-HDRI-OpenMP-x64 < 14.10.3`
- `Magick.NET-Q16-HDRI-arm64 < 14.10.3`
- `Magick.NET-Q16-HDRI-x64 < 14.10.3`
- `Magick.NET-Q16-HDRI-x86 < 14.10.3`
- `Magick.NET-Q16-OpenMP-arm64 < 14.10.3`
- `Magick.NET-Q16-OpenMP-x64 < 14.10.3`
- `Magick.NET-Q16-OpenMP-x86 < 14.10.3`
- `Magick.NET-Q16-arm64 < 14.10.3`
- `Magick.NET-Q8-AnyCPU < 14.10.3`
- `Magick.NET-Q8-OpenMP-arm64 < 14.10.3`
- `Magick.NET-Q8-OpenMP-x64 < 14.10.3`
- `Magick.NET-Q8-arm64 < 14.10.3`
- `Magick.NET-Q8-x64 < 14.10.3`
- `Magick.NET-Q8-x86 < 14.10.3`

Patched in:

- `Magick.NET-Q16-AnyCPU 14.10.3`
- `Magick.NET-Q16-HDRI-AnyCPU 14.10.3`
- `Magick.NET-Q16-HDRI-OpenMP-arm64 14.10.3`
- `Magick.NET-Q16-HDRI-OpenMP-x64 14.10.3`
- `Magick.NET-Q16-HDRI-arm64 14.10.3`
- `Magick.NET-Q16-HDRI-x64 14.10.3`
- `Magick.NET-Q16-HDRI-x86 14.10.3`
- `Magick.NET-Q16-OpenMP-arm64 14.10.3`
- `Magick.NET-Q16-OpenMP-x64 14.10.3`
- `Magick.NET-Q16-OpenMP-x86 14.10.3`
- `Magick.NET-Q16-arm64 14.10.3`
- `Magick.NET-Q8-AnyCPU 14.10.3`
- `Magick.NET-Q8-OpenMP-arm64 14.10.3`
- `Magick.NET-Q8-OpenMP-x64 14.10.3`
- `Magick.NET-Q8-arm64 14.10.3`
- `Magick.NET-Q8-x64 14.10.3`
- `Magick.NET-Q8-x86 14.10.3`

Source: https://github.com/advisories/GHSA-2gq3-ww97-wfjm