🛡️ CVE-2026-27798 — imagemagick

🟡 CVSS 4.0 — Medium ✅ No Known Exploit CWE-125 NVD
4.0
CVSS Score
0 Low4 Medium7 High9 Critical10

Description

ImageMagick: Heap Buffer Over-read in WaveletDenoise when processing small images

A heap buffer over-read vulnerability occurs when processing an image with small dimension using the -wavelet-denoise operator.

```

==3693336==ERROR: AddressSanitizer: heap-buffer-overflow on address 0x511000001280 at pc 0x5602c8b0cc75 bp 0x7ffcb105d510 sp 0x7ffcb105d500

READ of size 4 at 0x511000001280 thread T0

```

How this vulnerability can be exploited

This issue can be reached with local access to the system, attack complexity is low, an attacker needs no privileges on the target. No user interaction is required. The scope is unchanged, so the impact stays within the vulnerable component. Rated impact: confidentiality low, integrity none, availability none.

Weakness class

CVE-2026-27798 is classified as CWE-125: Out-of-bounds Read. The code reads past the limits of a buffer, exposing adjacent memory contents or crashing the process.

Affected software

CVE-2026-27798 is recorded against 21 packages.

  • imagemagick (from 7.0.0-0 up to 7.1.2-15)
  • magick.net (fixed in 14.10.3)
  • magick.net-q16-anycpu (fixed in 14.10.3)
  • magick.net-q16-arm64 (fixed in 14.10.3)
  • magick.net-q16-hdri-anycpu (fixed in 14.10.3)
  • magick.net-q16-hdri-arm64 (fixed in 14.10.3)
  • magick.net-q16-hdri-openmp-arm64 (fixed in 14.10.3)
  • magick.net-q16-hdri-openmp-x64 (fixed in 14.10.3)
  • magick.net-q16-hdri-x64 (fixed in 14.10.3)
  • magick.net-q16-hdri-x86 (fixed in 14.10.3)
  • magick.net-q16-openmp-arm64 (fixed in 14.10.3)
  • magick.net-q16-openmp-x64 (fixed in 14.10.3)
  • magick.net-q16-openmp-x86 (fixed in 14.10.3)
  • magick.net-q16-x64 (fixed in 14.10.3)
  • magick.net-q16-x86 (fixed in 14.10.3)
  • magick.net-q8-anycpu (fixed in 14.10.3)
  • magick.net-q8-arm64 (fixed in 14.10.3)
  • magick.net-q8-openmp-arm64 (fixed in 14.10.3)
  • magick.net-q8-openmp-x64 (fixed in 14.10.3)
  • magick.net-q8-x64 (fixed in 14.10.3)
  • magick.net-q8-x86 (fixed in 14.10.3)

Timeline and source

Published on 26 February 2026 and last revised on 17 June 2026. No public exploit is currently recorded for this entry. A vendor advisory or fix has been published. Record sourced from NVD.

References

github.com
github.com
github.com

CVE-2026-27798 on other distributions

Each distribution ships its own build and its own fixed version. Pick the one you run:

Details

Severity MEDIUM
CVSS Score 4.0
CVSS Vector CVSS:3.1/AV:L/AC:L/PR:N/UI:N/S:U/C:L/I:N/A:N
CWE CWE-125
Public Exploit ✅ No
Source NVD
Published 2026-02-26
Updated 2026-08-12
Modified 2026-06-17

Affected Packages

Software From version Fixed in
imagemagick 7.0.0-0 7.1.2-15
magick.net 14.10.3
magick.net-q16-anycpu 14.10.3
magick.net-q16-arm64 14.10.3
magick.net-q16-hdri-anycpu 14.10.3
magick.net-q16-hdri-arm64 14.10.3
magick.net-q16-hdri-openmp-arm64 14.10.3
magick.net-q16-hdri-openmp-x64 14.10.3
magick.net-q16-hdri-x64 14.10.3
magick.net-q16-hdri-x86 14.10.3
magick.net-q16-openmp-arm64 14.10.3
magick.net-q16-openmp-x64 14.10.3
magick.net-q16-openmp-x86 14.10.3
magick.net-q16-x64 14.10.3
magick.net-q16-x86 14.10.3
magick.net-q8-anycpu 14.10.3
magick.net-q8-arm64 14.10.3
magick.net-q8-openmp-arm64 14.10.3
magick.net-q8-openmp-x64 14.10.3
magick.net-q8-x64 14.10.3
magick.net-q8-x86 14.10.3

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