# CVE-2026-56374: ImageMagick heap buffer overflow in FTXT encoder

Source: https://junglewise.ai/threats/cve-2026-56374-imagemagick-heap-buffer-overflow-in-ftxt-encoder  
Publisher: Junglewise Threat Intelligence, https://junglewise.ai/threats  
Published: 2026-07-08. Updated: 2026-07-08  
License: CC BY 4.0 with a link back

CVE-2026-56374 · Severity: low · CVSS 3.3 · Published 2026-07-08

ImageMagick, a widely used software suite for editing and converting images, contains a flaw in how it processes specific text-based image formats. An attacker could provide a specially crafted image file that, when processed, causes the application to crash or potentially leak small amounts of memory. This could lead to a temporary service disruption for applications that rely on ImageMagick to process user-uploaded content.

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-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-2026-56374 exploited in the wild?** No. Junglewise Threat Intelligence has no report of CVE-2026-56374 being exploited in the wild.

**How severe is CVE-2026-56374?** Low severity, with a CVSS score of 3.3, published 8 July 2026.

**Which products and versions are affected?** Magick.NET-Q16-AnyCPU (NuGet) ECOSYSTEM:introduced=0,fixed=14.12.0; Magick.NET-Q16-arm64 (NuGet) ECOSYSTEM:introduced=0,fixed=14.12.0; Magick.NET-Q16-HDRI-AnyCPU (NuGet) ECOSYSTEM:introduced=0,fixed=14.12.0; Magick.NET-Q16-HDRI-arm64 (NuGet) ECOSYSTEM:introduced=0,fixed=14.12.0; and 14 more.

**Is there a fix for CVE-2026-56374?** Yes. Magick.NET-Q16-AnyCPU (NuGet): upgrade to 14.12.0 or later; Magick.NET-Q16-arm64 (NuGet): upgrade to 14.12.0 or later; Magick.NET-Q16-HDRI-AnyCPU (NuGet): upgrade to 14.12.0 or later; Magick.NET-Q16-HDRI-arm64 (NuGet): upgrade to 14.12.0 or later; Magick.NET-Q16-HDRI-OpenMP-arm64 (NuGet): upgrade to 14.12.0 or later; Magick.NET-Q16-HDRI-OpenMP-x64 (NuGet): upgrade to 14.12.0 or later; Magick.NET-Q16-HDRI-x64 (NuGet): upgrade to 14.12.0 or later; Magick.NET-Q16-HDRI-x86 (NuGet): upgrade to 14.12.0 or later; Magick.NET-Q16-OpenMP-arm64 (NuGet): upgrade to 14.12.0 or later; Magick.NET-Q16-OpenMP-x64 (NuGet): upgrade to 14.12.0 or later; Magick.NET-Q16-x64 (NuGet): upgrade to 14.12.0 or later; Magick.NET-Q16-x86 (NuGet): upgrade to 14.12.0 or later; Magick.NET-Q8-AnyCPU (NuGet): upgrade to 14.12.0 or later; Magick.NET-Q8-arm64 (NuGet): upgrade to 14.12.0 or later; Magick.NET-Q8-OpenMP-arm64 (NuGet): upgrade to 14.12.0 or later; Magick.NET-Q8-OpenMP-x64 (NuGet): upgrade to 14.12.0 or later; Magick.NET-Q8-x64 (NuGet): upgrade to 14.12.0 or later; Magick.NET-Q8-x86 (NuGet): upgrade to 14.12.0 or later. Junglewise finds every place you run it, drafts the upgrade and applies it once you approve.

**How is CVE-2026-56374 attacked?** It is attacked with local access, in a software library.

**Am I affected by CVE-2026-56374?** 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 14.12.0 or later

  ```sh
  dotnet add package Magick.NET-Q16-AnyCPU --version 14.12.0
  ```

- Magick.NET-Q16-arm64 (NuGet): upgrade to 14.12.0 or later

  ```sh
  dotnet add package Magick.NET-Q16-arm64 --version 14.12.0
  ```

- Magick.NET-Q16-HDRI-AnyCPU (NuGet): upgrade to 14.12.0 or later

  ```sh
  dotnet add package Magick.NET-Q16-HDRI-AnyCPU --version 14.12.0
  ```

- Magick.NET-Q16-HDRI-arm64 (NuGet): upgrade to 14.12.0 or later

  ```sh
  dotnet add package Magick.NET-Q16-HDRI-arm64 --version 14.12.0
  ```

- Magick.NET-Q16-HDRI-OpenMP-arm64 (NuGet): upgrade to 14.12.0 or later

  ```sh
  dotnet add package Magick.NET-Q16-HDRI-OpenMP-arm64 --version 14.12.0
  ```

- Magick.NET-Q16-HDRI-OpenMP-x64 (NuGet): upgrade to 14.12.0 or later

  ```sh
  dotnet add package Magick.NET-Q16-HDRI-OpenMP-x64 --version 14.12.0
  ```

- Magick.NET-Q16-HDRI-x64 (NuGet): upgrade to 14.12.0 or later

  ```sh
  dotnet add package Magick.NET-Q16-HDRI-x64 --version 14.12.0
  ```

- Magick.NET-Q16-HDRI-x86 (NuGet): upgrade to 14.12.0 or later

  ```sh
  dotnet add package Magick.NET-Q16-HDRI-x86 --version 14.12.0
  ```

- Magick.NET-Q16-OpenMP-arm64 (NuGet): upgrade to 14.12.0 or later

  ```sh
  dotnet add package Magick.NET-Q16-OpenMP-arm64 --version 14.12.0
  ```

- Magick.NET-Q16-OpenMP-x64 (NuGet): upgrade to 14.12.0 or later

  ```sh
  dotnet add package Magick.NET-Q16-OpenMP-x64 --version 14.12.0
  ```

- Magick.NET-Q16-x64 (NuGet): upgrade to 14.12.0 or later

  ```sh
  dotnet add package Magick.NET-Q16-x64 --version 14.12.0
  ```

- Magick.NET-Q16-x86 (NuGet): upgrade to 14.12.0 or later

  ```sh
  dotnet add package Magick.NET-Q16-x86 --version 14.12.0
  ```

- Magick.NET-Q8-AnyCPU (NuGet): upgrade to 14.12.0 or later

  ```sh
  dotnet add package Magick.NET-Q8-AnyCPU --version 14.12.0
  ```

- Magick.NET-Q8-arm64 (NuGet): upgrade to 14.12.0 or later

  ```sh
  dotnet add package Magick.NET-Q8-arm64 --version 14.12.0
  ```

- Magick.NET-Q8-OpenMP-arm64 (NuGet): upgrade to 14.12.0 or later

  ```sh
  dotnet add package Magick.NET-Q8-OpenMP-arm64 --version 14.12.0
  ```

- Magick.NET-Q8-OpenMP-x64 (NuGet): upgrade to 14.12.0 or later

  ```sh
  dotnet add package Magick.NET-Q8-OpenMP-x64 --version 14.12.0
  ```

- Magick.NET-Q8-x64 (NuGet): upgrade to 14.12.0 or later

  ```sh
  dotnet add package Magick.NET-Q8-x64 --version 14.12.0
  ```

- Magick.NET-Q8-x86 (NuGet): upgrade to 14.12.0 or later

  ```sh
  dotnet add package Magick.NET-Q8-x86 --version 14.12.0
  ```


## Technical details

A heap buffer overflow (specifically an out-of-bounds read) exists in ImageMagick's FTXT encoder. The vulnerability is caused by missing boundary checks when the software parses the 'ftxt:format' parameter within an image file. An attacker can exploit this by crafting a malicious FTXT file that, when processed by a vulnerable version of ImageMagick, triggers an AddressSanitizer-detected heap-buffer-overflow. The attack requires local execution or user interaction (opening a file) and primarily impacts availability (denial of service) or potentially confidentiality (information disclosure). The issue is resolved in version 7.1.2-19.

## Affected products

- ImageMagick ImageMagick < 7.1.2-19

## Identifiers

- CVE-2026-56374
- GHSA-w54j-7wpm-crhj

## Timeline

- 2026-04-13: advisory: GitHub Security Advisory published
- 2026-07-08: disclosed: CVE published to NVD
- 2026-07-08: patched: Fix confirmed in version 7.1.2-19

## References

- [https://github.com/ImageMagick/ImageMagick/security/advisories/GHSA-w54j-7wpm-crhj](https://github.com/ImageMagick/ImageMagick/security/advisories/GHSA-w54j-7wpm-crhj)
- [https://www.vulncheck.com/advisories/imagemagick-heap-buffer-overflow-in-ftxt-encoder-via-format-parameter](https://www.vulncheck.com/advisories/imagemagick-heap-buffer-overflow-in-ftxt-encoder-via-format-parameter)

## 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)