# CVE-2026-61870: ImageMagick memory leak in VIFF encoder

Source: https://junglewise.ai/threats/cve-2026-61870-imagemagick-memory-leak-in-viff-encoder  
Publisher: Junglewise Threat Intelligence, https://junglewise.ai/threats  
Published: 2026-07-11. Updated: 2026-07-11  
License: CC BY 4.0 with a link back

CVE-2026-61870 · Severity: low · CVSS 3.1 · Published 2026-07-11

ImageMagick, a widely used software suite for editing and converting images, is affected by a memory management flaw in its VIFF image encoder. By providing a specially crafted image file, an attacker could cause the software to leak memory, potentially leading to a system slowdown or crash. This impact is generally limited to a denial-of-service condition on the machine processing the image.

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-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-2026-61870 exploited in the wild?** No. Junglewise Threat Intelligence has no report of CVE-2026-61870 being exploited in the wild.

**How severe is CVE-2026-61870?** Low severity, with a CVSS score of 3.1, published 11 July 2026.

**Which products and versions are affected?** Magick.NET-Q16-AnyCPU (NuGet) ECOSYSTEM:introduced=0,fixed=14.15.0; Magick.NET-Q16-arm64 (NuGet) ECOSYSTEM:introduced=0,fixed=14.15.0; Magick.NET-Q16-HDRI-AnyCPU (NuGet) ECOSYSTEM:introduced=0,fixed=14.15.0; Magick.NET-Q16-HDRI-arm64 (NuGet) ECOSYSTEM:introduced=0,fixed=14.15.0; and 13 more.

**Is there a fix for CVE-2026-61870?** Yes. Magick.NET-Q16-AnyCPU (NuGet): upgrade to 14.15.0 or later; Magick.NET-Q16-arm64 (NuGet): upgrade to 14.15.0 or later; Magick.NET-Q16-HDRI-AnyCPU (NuGet): upgrade to 14.15.0 or later; Magick.NET-Q16-HDRI-arm64 (NuGet): upgrade to 14.15.0 or later; Magick.NET-Q16-HDRI-OpenMP-arm64 (NuGet): upgrade to 14.15.0 or later; Magick.NET-Q16-HDRI-x64 (NuGet): upgrade to 14.15.0 or later; Magick.NET-Q16-HDRI-x86 (NuGet): upgrade to 14.15.0 or later; Magick.NET-Q16-OpenMP-arm64 (NuGet): upgrade to 14.15.0 or later; Magick.NET-Q16-OpenMP-x64 (NuGet): upgrade to 14.15.0 or later; Magick.NET-Q16-x64 (NuGet): upgrade to 14.15.0 or later; Magick.NET-Q16-x86 (NuGet): upgrade to 14.15.0 or later; Magick.NET-Q8-AnyCPU (NuGet): upgrade to 14.15.0 or later; Magick.NET-Q8-arm64 (NuGet): upgrade to 14.15.0 or later; Magick.NET-Q8-OpenMP-arm64 (NuGet): upgrade to 14.15.0 or later; Magick.NET-Q8-OpenMP-x64 (NuGet): upgrade to 14.15.0 or later; Magick.NET-Q8-x64 (NuGet): upgrade to 14.15.0 or later; Magick.NET-Q8-x86 (NuGet): upgrade to 14.15.0 or later. Junglewise finds every place you run it, drafts the upgrade and applies it once you approve.

**How is CVE-2026-61870 attacked?** It is attacked with local access, in a software library.

**Am I affected by CVE-2026-61870?** 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 14.15.0 or later

  ```sh
  dotnet add package Magick.NET-Q16-AnyCPU --version 14.15.0
  ```

- Magick.NET-Q16-arm64 (NuGet): upgrade to 14.15.0 or later

  ```sh
  dotnet add package Magick.NET-Q16-arm64 --version 14.15.0
  ```

- Magick.NET-Q16-HDRI-AnyCPU (NuGet): upgrade to 14.15.0 or later

  ```sh
  dotnet add package Magick.NET-Q16-HDRI-AnyCPU --version 14.15.0
  ```

- Magick.NET-Q16-HDRI-arm64 (NuGet): upgrade to 14.15.0 or later

  ```sh
  dotnet add package Magick.NET-Q16-HDRI-arm64 --version 14.15.0
  ```

- Magick.NET-Q16-HDRI-OpenMP-arm64 (NuGet): upgrade to 14.15.0 or later

  ```sh
  dotnet add package Magick.NET-Q16-HDRI-OpenMP-arm64 --version 14.15.0
  ```

- Magick.NET-Q16-HDRI-x64 (NuGet): upgrade to 14.15.0 or later

  ```sh
  dotnet add package Magick.NET-Q16-HDRI-x64 --version 14.15.0
  ```

- Magick.NET-Q16-HDRI-x86 (NuGet): upgrade to 14.15.0 or later

  ```sh
  dotnet add package Magick.NET-Q16-HDRI-x86 --version 14.15.0
  ```

- Magick.NET-Q16-OpenMP-arm64 (NuGet): upgrade to 14.15.0 or later

  ```sh
  dotnet add package Magick.NET-Q16-OpenMP-arm64 --version 14.15.0
  ```

- Magick.NET-Q16-OpenMP-x64 (NuGet): upgrade to 14.15.0 or later

  ```sh
  dotnet add package Magick.NET-Q16-OpenMP-x64 --version 14.15.0
  ```

- Magick.NET-Q16-x64 (NuGet): upgrade to 14.15.0 or later

  ```sh
  dotnet add package Magick.NET-Q16-x64 --version 14.15.0
  ```

- Magick.NET-Q16-x86 (NuGet): upgrade to 14.15.0 or later

  ```sh
  dotnet add package Magick.NET-Q16-x86 --version 14.15.0
  ```

- Magick.NET-Q8-AnyCPU (NuGet): upgrade to 14.15.0 or later

  ```sh
  dotnet add package Magick.NET-Q8-AnyCPU --version 14.15.0
  ```

- Magick.NET-Q8-arm64 (NuGet): upgrade to 14.15.0 or later

  ```sh
  dotnet add package Magick.NET-Q8-arm64 --version 14.15.0
  ```

- Magick.NET-Q8-OpenMP-arm64 (NuGet): upgrade to 14.15.0 or later

  ```sh
  dotnet add package Magick.NET-Q8-OpenMP-arm64 --version 14.15.0
  ```

- Magick.NET-Q8-OpenMP-x64 (NuGet): upgrade to 14.15.0 or later

  ```sh
  dotnet add package Magick.NET-Q8-OpenMP-x64 --version 14.15.0
  ```

- Magick.NET-Q8-x64 (NuGet): upgrade to 14.15.0 or later

  ```sh
  dotnet add package Magick.NET-Q8-x64 --version 14.15.0
  ```

- Magick.NET-Q8-x86 (NuGet): upgrade to 14.15.0 or later

  ```sh
  dotnet add package Magick.NET-Q8-x86 --version 14.15.0
  ```


## Technical details

A memory leak vulnerability (CWE-401) exists in ImageMagick's VIFF encoder. The flaw occurs when a memory allocation failure is encountered during the encoding process, resulting in the software failing to release previously allocated memory. An attacker can exploit this by providing a specially crafted VIFF image designed to trigger these allocation failures. Successful exploitation leads to gradual memory exhaustion and a local denial-of-service (DoS) condition. The vulnerability is addressed in versions 7.1.2-26 and 6.9.13-51.

## Affected products

- ImageMagick ImageMagick < 7.1.2-26
- ImageMagick ImageMagick < 6.9.13-51

## Identifiers

- CVE-2026-61870
- GHSA-m596-67p7-69wh

## Timeline

- 2026-06-26: advisory: GitHub Security Advisory published
- 2026-07-11: disclosed: CVE published to NVD

## References

- [https://github.com/ImageMagick/ImageMagick/security/advisories/GHSA-m596-67p7-69wh](https://github.com/ImageMagick/ImageMagick/security/advisories/GHSA-m596-67p7-69wh)
- [https://www.vulncheck.com/advisories/imagemagick-before-26-memory-leak-via-viff-encoder](https://www.vulncheck.com/advisories/imagemagick-before-26-memory-leak-via-viff-encoder)

## 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)