---
id: "CVE-2026-56378"
page: "https://infrastack.ai/live/CVE-2026-56378"
kind: "vulnerability"
aliases: ["CVE-2026-56378", "GHSA-wgxp-q8xq-wpp9"]
title: "ImageMagick: Malicious PCD files trigger 1\u2011byte heap Out-of-bounds Read and DoS"
severity: "high"
cvss: 8.2
epss: 0.00389
exploited: false
status: "open"
category: "package"
products: [{"name": "Magick.NET-Q16-AnyCPU", "fixed": ["14.10.3"], "affected": "< 14.10.3", "ecosystem": "nuget"}, {"name": "Magick.NET-Q16-HDRI-AnyCPU", "fixed": ["14.10.3"], "affected": "< 14.10.3", "ecosystem": "nuget"}, {"name": "Magick.NET-Q16-HDRI-OpenMP-arm64", "fixed": ["14.10.3"], "affected": "< 14.10.3", "ecosystem": "nuget"}, {"name": "Magick.NET-Q16-HDRI-OpenMP-x64", "fixed": ["14.10.3"], "affected": "< 14.10.3", "ecosystem": "nuget"}, {"name": "Magick.NET-Q16-HDRI-arm64", "fixed": ["14.10.3"], "affected": "< 14.10.3", "ecosystem": "nuget"}, {"name": "Magick.NET-Q16-HDRI-x64", "fixed": ["14.10.3"], "affected": "< 14.10.3", "ecosystem": "nuget"}, {"name": "Magick.NET-Q16-HDRI-x86", "fixed": ["14.10.3"], "affected": "< 14.10.3", "ecosystem": "nuget"}, {"name": "Magick.NET-Q16-OpenMP-arm64", "fixed": ["14.10.3"], "affected": "< 14.10.3", "ecosystem": "nuget"}, {"name": "Magick.NET-Q16-OpenMP-x64", "fixed": ["14.10.3"], "affected": "< 14.10.3", "ecosystem": "nuget"}, {"name": "Magick.NET-Q16-OpenMP-x86", "fixed": ["14.10.3"], "affected": "< 14.10.3", "ecosystem": "nuget"}, {"name": "Magick.NET-Q16-arm64", "fixed": ["14.10.3"], "affected": "< 14.10.3", "ecosystem": "nuget"}, {"name": "Magick.NET-Q16-x64", "fixed": ["14.10.3"], "affected": "< 14.10.3", "ecosystem": "nuget"}, {"name": "Magick.NET-Q16-x86", "fixed": ["14.10.3"], "affected": "< 14.10.3", "ecosystem": "nuget"}, {"name": "Magick.NET-Q8-AnyCPU", "fixed": ["14.10.3"], "affected": "< 14.10.3", "ecosystem": "nuget"}, {"name": "Magick.NET-Q8-OpenMP-arm64", "fixed": ["14.10.3"], "affected": "< 14.10.3", "ecosystem": "nuget"}, {"name": "Magick.NET-Q8-OpenMP-x64", "fixed": ["14.10.3"], "affected": "< 14.10.3", "ecosystem": "nuget"}, {"name": "Magick.NET-Q8-arm64", "fixed": ["14.10.3"], "affected": "< 14.10.3", "ecosystem": "nuget"}, {"name": "Magick.NET-Q8-x64", "fixed": ["14.10.3"], "affected": "< 14.10.3", "ecosystem": "nuget"}, {"name": "Magick.NET-Q8-x86", "fixed": ["14.10.3"], "affected": "< 14.10.3", "ecosystem": "nuget"}, {"name": "imagemagick", "fixed": ["6.9.13-40"], "affected": ">= 6.9.0-0, < 6.9.13-40", "ecosystem": "vendor"}, {"name": "imagemagick", "fixed": ["7.1.2-15"], "affected": ">= 7.1.2-0, < 7.1.2-15", "ecosystem": "vendor"}]
ecosystems: ["nuget", "vendor"]
tags: ["cwe-125", "dotnet", "image-processing", "imagemagick", "magick.net", "package"]
not_affected_if: ["no-untrusted-images", "version-14.10.3-or-later"]
published_at: "2026-02-25T19:12:23+00:00"
first_seen_at: "2026-11-06T18:11:02+00:00"
updated_at: "2026-11-06T18:13:15+00:00"
sources: [{"source": "ghsa", "url": "https://github.com/advisories/GHSA-wgxp-q8xq-wpp9", "first_seen_at": "2026-11-06T18:11:02+00:00"}, {"source": "nvd", "url": "https://nvd.nist.gov/vuln/detail/CVE-2026-56378", "first_seen_at": "2026-11-06T18:13:15+00:00"}]
exploit_sources: [{"type": "epss", "score": 0.00389, "url": "https://api.first.org/data/v1/epss?cve=CVE-2026-56378"}]
---

# ImageMagick: Malicious PCD files trigger 1‑byte heap Out-of-bounds Read and DoS

Link for people: https://infrastack.ai/live/CVE-2026-56378 (this .md is for agents)

Magick.NET, the .NET wrapper for ImageMagick, reads one byte past a heap buffer when decoding a crafted PCD (Kodak Photo CD) image. An attacker who supplies such a file can crash the process and may read one adjacent heap byte.

_Summary, check and fix written by a model from the sources; labelled as such._

## Affected

- nuget:Magick.NET-Q16-AnyCPU affected < 14.10.3 fixed 14.10.3
- nuget:Magick.NET-Q16-HDRI-AnyCPU affected < 14.10.3 fixed 14.10.3
- nuget:Magick.NET-Q16-HDRI-OpenMP-arm64 affected < 14.10.3 fixed 14.10.3
- nuget:Magick.NET-Q16-HDRI-OpenMP-x64 affected < 14.10.3 fixed 14.10.3
- nuget:Magick.NET-Q16-HDRI-arm64 affected < 14.10.3 fixed 14.10.3
- nuget:Magick.NET-Q16-HDRI-x64 affected < 14.10.3 fixed 14.10.3
- nuget:Magick.NET-Q16-HDRI-x86 affected < 14.10.3 fixed 14.10.3
- nuget:Magick.NET-Q16-OpenMP-arm64 affected < 14.10.3 fixed 14.10.3
- nuget:Magick.NET-Q16-OpenMP-x64 affected < 14.10.3 fixed 14.10.3
- nuget:Magick.NET-Q16-OpenMP-x86 affected < 14.10.3 fixed 14.10.3
- nuget:Magick.NET-Q16-arm64 affected < 14.10.3 fixed 14.10.3
- nuget:Magick.NET-Q16-x64 affected < 14.10.3 fixed 14.10.3
- nuget:Magick.NET-Q16-x86 affected < 14.10.3 fixed 14.10.3
- nuget:Magick.NET-Q8-AnyCPU affected < 14.10.3 fixed 14.10.3
- nuget:Magick.NET-Q8-OpenMP-arm64 affected < 14.10.3 fixed 14.10.3
- nuget:Magick.NET-Q8-OpenMP-x64 affected < 14.10.3 fixed 14.10.3
- nuget:Magick.NET-Q8-arm64 affected < 14.10.3 fixed 14.10.3
- nuget:Magick.NET-Q8-x64 affected < 14.10.3 fixed 14.10.3
- nuget:Magick.NET-Q8-x86 affected < 14.10.3 fixed 14.10.3
- vendor:imagemagick affected >= 6.9.0-0, < 6.9.13-40 fixed 6.9.13-40
- vendor:imagemagick affected >= 7.1.2-0, < 7.1.2-15 fixed 7.1.2-15

## How to check

- Look for the Magick.NET-Q16 or Magick.NET-Q8 packages in the project's `.csproj` or `packages.lock.json`, and check the resolved version.
- Confirm whether the application passes user-supplied files to ImageMagick for decoding.

## Fix

- Magick.NET packages (all Q8 and Q16 variants): upgrade to `14.10.3`

## Timeline

- 2026-11-06T18:11:02+00:00 ghsa https://github.com/advisories/GHSA-wgxp-q8xq-wpp9
- 2026-11-06T18:13:15+00:00 nvd https://nvd.nist.gov/vuln/detail/CVE-2026-56378

## Documents

- [advisory] Maintainer's advisory: api.github.com https://api.github.com/repos/ImageMagick/ImageMagick/security-advisories/GHSA-wgxp-q8xq-wpp9
- [advisory] Maintainer's advisory: github.com https://github.com/ImageMagick/ImageMagick/security/advisories/GHSA-wgxp-q8xq-wpp9
- [advisory] Third-party advisory: www.vulncheck.com https://www.vulncheck.com/advisories/imagemagick-heap-out-of-bounds-read-in-pcd-decoder
- [fix] Patch: github.com https://github.com/ImageMagick/ImageMagick/commit/436e5d2589e3c0adc10d9aa189e81d5d088d8207

## From the sources

ImageMagick before 7.1.2-15 (and 6.x before 6.9.13-40) contains a heap out-of-bounds read in the PCD coder's DecodeImage loop. A crafted PCD file can trigger a one-byte heap out-of-bounds read during image decoding, resulting in denial of service and potential disclosure of an adjacent heap byte.

---

_Free to read, with fair use of about 60 pages a minute. For higher limits or API access: sales@infrastack.ai_