# CVE-2026-56378: ImageMagick heap out-of-bounds read in PCD coder

Source: https://junglewise.ai/threats/cve-2026-56378-imagemagick-heap-out-of-bounds-read-in-pcd-coder  
Publisher: Junglewise Threat Intelligence, https://junglewise.ai/threats  
Published: 2026-06-21. Updated: 2026-06-21  
License: CC BY 4.0 with a link back

CVE-2026-56378 · Severity: low · CVSS 3.7 · Published 2026-06-21

ImageMagick is a widely used software suite for displaying, converting, and editing image files. A vulnerability in its PCD image format decoder allows a specially crafted file to cause a minor memory error during processing. This could lead to a temporary service crash or the unintended exposure of a small amount of internal memory data.

Technologies: [Magick.NET-Q16-AnyCPU (NuGet)](https://junglewise.ai/threats/technologies/magick-net-q16-anycpu), [Magick.NET-Q16-arm64 (NuGet)](https://junglewise.ai/threats/technologies/magick-net-q16-arm64), [Magick.NET-Q16-HDRI-AnyCPU (NuGet)](https://junglewise.ai/threats/technologies/magick-net-q16-hdri-anycpu), [Magick.NET-Q16-HDRI-arm64 (NuGet)](https://junglewise.ai/threats/technologies/magick-net-q16-hdri-arm64), [Magick.NET-Q16-HDRI-OpenMP-arm64 (NuGet)](https://junglewise.ai/threats/technologies/magick-net-q16-hdri-openmp-arm64), [Magick.NET-Q16-HDRI-OpenMP-x64 (NuGet)](https://junglewise.ai/threats/technologies/magick-net-q16-hdri-openmp-x64), [Magick.NET-Q16-HDRI-x64 (NuGet)](https://junglewise.ai/threats/technologies/magick-net-q16-hdri-x64), [Magick.NET-Q16-HDRI-x86 (NuGet)](https://junglewise.ai/threats/technologies/magick-net-q16-hdri-x86), [Magick.NET-Q16-OpenMP-arm64 (NuGet)](https://junglewise.ai/threats/technologies/magick-net-q16-openmp-arm64), [Magick.NET-Q16-OpenMP-x64 (NuGet)](https://junglewise.ai/threats/technologies/magick-net-q16-openmp-x64), [Magick.NET-Q16-OpenMP-x86 (NuGet)](https://junglewise.ai/threats/technologies/magick-net-q16-openmp-x86), [Magick.NET-Q16-x64 (NuGet)](https://junglewise.ai/threats/technologies/magick-net-q16-x64), [Magick.NET-Q16-x86 (NuGet)](https://junglewise.ai/threats/technologies/magick-net-q16-x86), [Magick.NET-Q8-AnyCPU (NuGet)](https://junglewise.ai/threats/technologies/magick-net-q8-anycpu), [Magick.NET-Q8-arm64 (NuGet)](https://junglewise.ai/threats/technologies/magick-net-q8-arm64), [Magick.NET-Q8-OpenMP-arm64 (NuGet)](https://junglewise.ai/threats/technologies/magick-net-q8-openmp-arm64), [Magick.NET-Q8-OpenMP-x64 (NuGet)](https://junglewise.ai/threats/technologies/magick-net-q8-openmp-x64), [Magick.NET-Q8-x64 (NuGet)](https://junglewise.ai/threats/technologies/magick-net-q8-x64), [Magick.NET-Q8-x86 (NuGet)](https://junglewise.ai/threats/technologies/magick-net-q8-x86). Vendors: [NuGet](https://junglewise.ai/threats/vendors/nuget).

## Quick answers

**Is CVE-2026-56378 exploited in the wild?** No. Junglewise Threat Intelligence has no report of CVE-2026-56378 being exploited in the wild.

**How severe is CVE-2026-56378?** Low severity, with a CVSS score of 3.7, published 21 June 2026.

**Which products and versions are affected?** Magick.NET-Q16-AnyCPU (NuGet) < 14.10.3, ECOSYSTEM:introduced=0,fixed=14.10.3; Magick.NET-Q16-arm64 (NuGet) < 14.10.3, ECOSYSTEM:introduced=0,fixed=14.10.3; Magick.NET-Q16-HDRI-AnyCPU (NuGet) < 14.10.3, ECOSYSTEM:introduced=0,fixed=14.10.3; Magick.NET-Q16-HDRI-arm64 (NuGet) < 14.10.3, ECOSYSTEM:introduced=0,fixed=14.10.3; and 15 more.

**Is there a fix for CVE-2026-56378?** Yes. Magick.NET-Q16-AnyCPU (NuGet): upgrade to 14.10.3 or later; Magick.NET-Q16-arm64 (NuGet): upgrade to 14.10.3 or later; Magick.NET-Q16-HDRI-AnyCPU (NuGet): upgrade to 14.10.3 or later; Magick.NET-Q16-HDRI-arm64 (NuGet): upgrade to 14.10.3 or later; Magick.NET-Q16-HDRI-OpenMP-arm64 (NuGet): upgrade to 14.10.3 or later; Magick.NET-Q16-HDRI-OpenMP-x64 (NuGet): upgrade to 14.10.3 or later; Magick.NET-Q16-HDRI-x64 (NuGet): upgrade to 14.10.3 or later; Magick.NET-Q16-HDRI-x86 (NuGet): upgrade to 14.10.3 or later; Magick.NET-Q16-OpenMP-arm64 (NuGet): upgrade to 14.10.3 or later; Magick.NET-Q16-OpenMP-x64 (NuGet): upgrade to 14.10.3 or later; Magick.NET-Q16-OpenMP-x86 (NuGet): upgrade to 14.10.3 or later; Magick.NET-Q16-x64 (NuGet): upgrade to 14.10.3 or later; Magick.NET-Q16-x86 (NuGet): upgrade to 14.10.3 or later; Magick.NET-Q8-AnyCPU (NuGet): upgrade to 14.10.3 or later; Magick.NET-Q8-arm64 (NuGet): upgrade to 14.10.3 or later; Magick.NET-Q8-OpenMP-arm64 (NuGet): upgrade to 14.10.3 or later; Magick.NET-Q8-OpenMP-x64 (NuGet): upgrade to 14.10.3 or later; Magick.NET-Q8-x64 (NuGet): upgrade to 14.10.3 or later; Magick.NET-Q8-x86 (NuGet): upgrade to 14.10.3 or later. Junglewise finds every place you run it, drafts the upgrade and applies it once you approve.

**How is CVE-2026-56378 attacked?** It is attacked over the network, in a software library.

**Am I affected by CVE-2026-56378?** Check whether you run Magick.NET-Q16-AnyCPU (NuGet), Magick.NET-Q16-arm64 (NuGet), Magick.NET-Q16-HDRI-AnyCPU (NuGet) or one of the others listed at an affected version. Junglewise does that check for you around the clock: connect your code, cloud and domains, and it matches new vulnerabilities like this one against what you actually run and tells you when one reaches you.

## How to fix

- Magick.NET-Q16-AnyCPU (NuGet): upgrade to 14.10.3 or later

  ```sh
  dotnet add package Magick.NET-Q16-AnyCPU --version 14.10.3
  ```

- Magick.NET-Q16-arm64 (NuGet): upgrade to 14.10.3 or later

  ```sh
  dotnet add package Magick.NET-Q16-arm64 --version 14.10.3
  ```

- Magick.NET-Q16-HDRI-AnyCPU (NuGet): upgrade to 14.10.3 or later

  ```sh
  dotnet add package Magick.NET-Q16-HDRI-AnyCPU --version 14.10.3
  ```

- Magick.NET-Q16-HDRI-arm64 (NuGet): upgrade to 14.10.3 or later

  ```sh
  dotnet add package Magick.NET-Q16-HDRI-arm64 --version 14.10.3
  ```

- Magick.NET-Q16-HDRI-OpenMP-arm64 (NuGet): upgrade to 14.10.3 or later

  ```sh
  dotnet add package Magick.NET-Q16-HDRI-OpenMP-arm64 --version 14.10.3
  ```

- Magick.NET-Q16-HDRI-OpenMP-x64 (NuGet): upgrade to 14.10.3 or later

  ```sh
  dotnet add package Magick.NET-Q16-HDRI-OpenMP-x64 --version 14.10.3
  ```

- Magick.NET-Q16-HDRI-x64 (NuGet): upgrade to 14.10.3 or later

  ```sh
  dotnet add package Magick.NET-Q16-HDRI-x64 --version 14.10.3
  ```

- Magick.NET-Q16-HDRI-x86 (NuGet): upgrade to 14.10.3 or later

  ```sh
  dotnet add package Magick.NET-Q16-HDRI-x86 --version 14.10.3
  ```

- Magick.NET-Q16-OpenMP-arm64 (NuGet): upgrade to 14.10.3 or later

  ```sh
  dotnet add package Magick.NET-Q16-OpenMP-arm64 --version 14.10.3
  ```

- Magick.NET-Q16-OpenMP-x64 (NuGet): upgrade to 14.10.3 or later

  ```sh
  dotnet add package Magick.NET-Q16-OpenMP-x64 --version 14.10.3
  ```

- Magick.NET-Q16-OpenMP-x86 (NuGet): upgrade to 14.10.3 or later

  ```sh
  dotnet add package Magick.NET-Q16-OpenMP-x86 --version 14.10.3
  ```

- Magick.NET-Q16-x64 (NuGet): upgrade to 14.10.3 or later

  ```sh
  dotnet add package Magick.NET-Q16-x64 --version 14.10.3
  ```

- Magick.NET-Q16-x86 (NuGet): upgrade to 14.10.3 or later

  ```sh
  dotnet add package Magick.NET-Q16-x86 --version 14.10.3
  ```

- Magick.NET-Q8-AnyCPU (NuGet): upgrade to 14.10.3 or later

  ```sh
  dotnet add package Magick.NET-Q8-AnyCPU --version 14.10.3
  ```

- Magick.NET-Q8-arm64 (NuGet): upgrade to 14.10.3 or later

  ```sh
  dotnet add package Magick.NET-Q8-arm64 --version 14.10.3
  ```

- Magick.NET-Q8-OpenMP-arm64 (NuGet): upgrade to 14.10.3 or later

  ```sh
  dotnet add package Magick.NET-Q8-OpenMP-arm64 --version 14.10.3
  ```

- Magick.NET-Q8-OpenMP-x64 (NuGet): upgrade to 14.10.3 or later

  ```sh
  dotnet add package Magick.NET-Q8-OpenMP-x64 --version 14.10.3
  ```

- Magick.NET-Q8-x64 (NuGet): upgrade to 14.10.3 or later

  ```sh
  dotnet add package Magick.NET-Q8-x64 --version 14.10.3
  ```

- Magick.NET-Q8-x86 (NuGet): upgrade to 14.10.3 or later

  ```sh
  dotnet add package Magick.NET-Q8-x86 --version 14.10.3
  ```


## Technical details

A heap out-of-bounds read vulnerability (CWE-125) exists in the PCD (Photo CD) coder within ImageMagick's DecodeImage loop. The flaw is triggered when the decoder processes a maliciously crafted PCD file, leading to a one-byte read beyond the allocated heap buffer. While the attack complexity is high and the impact is limited, it can result in a denial of service (crash) or the disclosure of a single adjacent byte from the heap. The issue is addressed in versions 7.1.2-15 and 6.9.13-40.

## Affected products

- ImageMagick ImageMagick < 7.1.2-15, < 6.9.13-40

## Identifiers

- CVE-2026-56378
- GHSA-wgxp-q8xq-wpp9

## Timeline

- 2026-02-23: advisory: Initial GitHub security advisory published
- 2026-06-21: disclosed: NVD publication date

## References

- [https://github.com/ImageMagick/ImageMagick/security/advisories/GHSA-wgxp-q8xq-wpp9](https://github.com/ImageMagick/ImageMagick/security/advisories/GHSA-wgxp-q8xq-wpp9)
- [https://www.vulncheck.com/advisories/imagemagick-heap-out-of-bounds-read-in-pcd-decoder](https://www.vulncheck.com/advisories/imagemagick-heap-out-of-bounds-read-in-pcd-decoder)

## Related threats

- [ImageMagick integer overflow in JNX decoder](https://junglewise.ai/threats/cve-2026-62946-imagemagick-integer-overflow-in-jnx-decoder)
- [ImageMagick heap buffer overflow in fx operation](https://junglewise.ai/threats/cve-2026-62363-imagemagick-heap-buffer-overflow-in-fx-operation)
- [ImageMagick heap buffer overwrite in morphology operation](https://junglewise.ai/threats/cve-2026-62343-imagemagick-heap-buffer-overwrite-in-morphology-operation)
- [ImageMagick memory leak in magick CLI via invalid options](https://junglewise.ai/threats/cve-2026-66011-imagemagick-memory-leak-in-magick-cli-via-invalid-options)
- [ImageMagick memory leak in TIFF encoder](https://junglewise.ai/threats/cve-2026-61872-imagemagick-memory-leak-in-tiff-encoder)