# CVE-2026-56373: ImageMagick use after free in PDB decoder

Source: https://junglewise.ai/threats/cve-2026-56373-imagemagick-use-after-free-in-pdb-decoder  
Publisher: Junglewise Threat Intelligence, https://junglewise.ai/threats  
Published: 2026-07-10. Updated: 2026-07-10  
License: CC BY 4.0 with a link back

CVE-2026-56373 · Severity: low · CVSS 3.7 · Published 2026-07-10

ImageMagick is a widely used software suite for displaying, converting, and editing image files. A vulnerability in its PDB (Palm Database) file decoder could allow a specially crafted file to cause the application to crash or behave unexpectedly. This could lead to a temporary service outage for applications that automatically process user-uploaded images.

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-2026-56373 exploited in the wild?** No. Junglewise Threat Intelligence has no report of CVE-2026-56373 being exploited in the wild.

**How severe is CVE-2026-56373?** Low severity, with a CVSS score of 3.7, published 10 July 2026.

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

**Is there a fix for CVE-2026-56373?** 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-2026-56373 attacked?** It is attacked over the network, in a software library.

**Am I affected by CVE-2026-56373?** 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 use-after-free (UAF) vulnerability exists in the PDB decoder of ImageMagick. The flaw is triggered when a memory allocation fails, causing the decoder to utilize a stale pointer. An attacker can exploit this by providing a malicious PDB file for processing, which may result in a denial-of-service (crash) or a single zero-byte write to freed memory. The attack vector is network-based but requires high complexity to successfully trigger the specific memory failure condition. The issue is resolved 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-2026-56373
- GHSA-3j4x-rwrx-xxj9

## Timeline

- 2026-02-23: advisory: Initial GitHub Security Advisory published
- 2026-07-10: disclosed: CVE published to NVD

## References

- [https://github.com/ImageMagick/ImageMagick/security/advisories/GHSA-3j4x-rwrx-xxj9](https://github.com/ImageMagick/ImageMagick/security/advisories/GHSA-3j4x-rwrx-xxj9)
- [https://www.vulncheck.com/advisories/imagemagick-use-after-free-write-in-pdb-decoder](https://www.vulncheck.com/advisories/imagemagick-use-after-free-write-in-pdb-decoder)

## Related threats

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- [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)