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

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), Magick.NET-Q16-arm64 (NuGet), Magick.NET-Q16-HDRI-AnyCPU (NuGet), Magick.NET-Q16-HDRI-arm64 (NuGet), Magick.NET-Q16-HDRI-OpenMP-arm64 (NuGet), Magick.NET-Q16-HDRI-OpenMP-x64 (NuGet), Magick.NET-Q16-HDRI-x64 (NuGet), Magick.NET-Q16-HDRI-x86 (NuGet), Magick.NET-Q16-OpenMP-arm64 (NuGet), Magick.NET-Q16-OpenMP-x64 (NuGet), Magick.NET-Q16-x64 (NuGet), Magick.NET-Q16-x86 (NuGet), Magick.NET-Q8-AnyCPU (NuGet), Magick.NET-Q8-arm64 (NuGet), Magick.NET-Q8-OpenMP-arm64 (NuGet), Magick.NET-Q8-OpenMP-x64 (NuGet), Magick.NET-Q8-x64 (NuGet), Magick.NET-Q8-x86 (NuGet). 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
    dotnet add package Magick.NET-Q16-AnyCPU --version 14.12.0
  • Magick.NET-Q16-arm64 (NuGet): upgrade to 14.12.0 or later
    dotnet add package Magick.NET-Q16-arm64 --version 14.12.0
  • Magick.NET-Q16-HDRI-AnyCPU (NuGet): upgrade to 14.12.0 or later
    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
    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
    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
    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
    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
    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
    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
    dotnet add package Magick.NET-Q16-OpenMP-x64 --version 14.12.0
  • Magick.NET-Q16-x64 (NuGet): upgrade to 14.12.0 or later
    dotnet add package Magick.NET-Q16-x64 --version 14.12.0
  • Magick.NET-Q16-x86 (NuGet): upgrade to 14.12.0 or later
    dotnet add package Magick.NET-Q16-x86 --version 14.12.0
  • Magick.NET-Q8-AnyCPU (NuGet): upgrade to 14.12.0 or later
    dotnet add package Magick.NET-Q8-AnyCPU --version 14.12.0
  • Magick.NET-Q8-arm64 (NuGet): upgrade to 14.12.0 or later
    dotnet add package Magick.NET-Q8-arm64 --version 14.12.0
  • Magick.NET-Q8-OpenMP-arm64 (NuGet): upgrade to 14.12.0 or later
    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
    dotnet add package Magick.NET-Q8-OpenMP-x64 --version 14.12.0
  • Magick.NET-Q8-x64 (NuGet): upgrade to 14.12.0 or later
    dotnet add package Magick.NET-Q8-x64 --version 14.12.0
  • Magick.NET-Q8-x86 (NuGet): upgrade to 14.12.0 or later
    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

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