4

CVSS Score

3.1

-

CVSS Score

Basic Information

Concerned about an active attack path?

Talk to our security experts and see Miggo in action.

Miggo Vulnerability Database

→

CVE-2026-46559

CVE-2026-46559: ImageMagick: Heap Buffer Over-Write of a single byte in the JP2 encoder

ImageMagick is free and open-source software used for editing and manipulating digital images. Prior to versions 6.9.13-48 and 7.1.2-23, an incorrect check in the JP2 will result in an heap buffer over-write of a single byte when specifying certain options. This issue has been patched in versions 6.9.13-48 and 7.1.2-23.

(GitHub Advisory)

Miggo Vulnerability Database

→

CVE-2026-46559

CVE-2026-46559:

4

CVSS Score

3.1

-

CVSS Score

Basic Information

Is this CVE running in your environment?

Easily map the attack path and prioritize which CVEs are a threat to your organization

Validate Exposure

Technical Details

SSVC / BOD 26-04 ↗

Exploitation NoneAutomatable NoTech Impact Partial

Select your environment

→SSVCDeferfix on upgrade

Runtime reachability resolves your actual outcome.Book a demo

Package Name	Ecosystem	Vulnerable Versions	First Patched Version
Magick.NET-Q16-AnyCPU	nuget	< 14.13.1	14.13.1
Magick.NET-Q16-HDRI-AnyCPU	nuget	< 14.13.1	14.13.1
Magick.NET-Q16-HDRI-OpenMP-arm64	nuget	< 14.13.1	14.13.1
Magick.NET-Q16-HDRI-OpenMP-x64	nuget	< 14.13.1	14.13.1
Magick.NET-Q16-HDRI-arm64	nuget	< 14.13.1	14.13.1
Magick.NET-Q16-HDRI-x64	nuget	< 14.13.1	14.13.1
Magick.NET-Q16-HDRI-x86	nuget	< 14.13.1	14.13.1
Magick.NET-Q16-OpenMP-arm64	nuget	< 14.13.1	14.13.1
Magick.NET-Q16-OpenMP-x64	nuget	< 14.13.1	14.13.1
Magick.NET-Q16-arm64	nuget	< 14.13.1	14.13.1
Magick.NET-Q16-x64	nuget	< 14.13.1	14.13.1
Magick.NET-Q16-x86	nuget	< 14.13.1	14.13.1
Magick.NET-Q8-AnyCPU	nuget	< 14.13.1	14.13.1
Magick.NET-Q8-OpenMP-arm64	nuget	< 14.13.1	14.13.1
Magick.NET-Q8-OpenMP-x64	nuget	< 14.13.1	14.13.1
Magick.NET-Q8-arm64	nuget	< 14.13.1	14.13.1
Magick.NET-Q8-x64	nuget	< 14.13.1	14.13.1
Magick.NET-Q8-x86	nuget	< 14.13.1	14.13.1

Technical Details

Vulnerability Intelligence
Miggo AI

Root Cause Analysis

The analysis began by examining the provided GitHub Security Advisory, which pointed to a heap buffer overflow in the JP2 encoder of ImageMagick. The advisory listed patched versions, which allowed for the identification of the relevant code changes. By comparing the git tags of the patched version (7.1.2-23) and the version before it (7.1.2-22), a specific commit (ff2f155f2874737380a80195c5849a2f06cb6ff7) was identified as the security patch, with its commit message directly referencing the advisory URL.

The commit modified the file coders/jp2.c, and the changes were confined to the WriteJP2Image function. The patch explicitly adds boundary checks to loops that parse floating-point numbers from user-provided options. The lack of these checks in the original code is the root cause of the vulnerability. When a user saves an image to the JP2 format and specifies a long list of values for either the PSNR or the compression rate, the application would write past the allocated buffer. Therefore, the WriteJP2Image function is the vulnerable function that would appear in a runtime profile during the exploitation of this vulnerability.

Vulnerable functions

WriteJP2Image

coders/jp2.c

The `WriteJP2Image` function is responsible for encoding images into the JP2 format. It parses user-supplied options, including quality settings (`tcp_distoratio`) and compression rates (`tcp_rates`). The original implementation of the loops that parsed these options from a string did not have a proper bounds check. A malicious user could provide a string with more values than the target arrays (`parameters->tcp_distoratio` and `parameters->tcp_rates`) could hold, leading to a heap buffer overflow. The patch introduces a check on the array size (`extent`) within the loop condition to prevent writing beyond the buffer's boundary.

Vulnerability Intelligence
Miggo AI

Unlock WAF rules for this CVE

Generate vendor-ready rules for the observed attack patterns, plus reasoning and safe deployment guidance

Get WAF rules

WAF Protection Rules

WAF Rule

W** rul*s *v*il**l* *or Mi**o *ustom*rs only.W** rul*s *v*il**l* *or Mi**o *ustom*rs only.W** rul*s *v*il**l* *or Mi**o *ustom*rs only.W** rul*s *v*il**l* *or Mi**o *ustom*rs only.W** rul*s *v*il**l* *or Mi**o *ustom*rs only.W** rul*s *v*il**l* *or Mi**o *ustom*rs only.W** rul*s *v*il**l* *or Mi**o *ustom*rs only.W** rul*s *v*il**l* *or Mi**o *ustom*rs only.W** rul*s *v*il**l* *or Mi**o *ustom*rs only.W** rul*s *v*il**l* *or Mi**o *ustom*rs only.

Reasoning

*v*il**l* *or Mi**o *ustom*rs only.*v*il**l* *or Mi**o *ustom*rs only.*v*il**l* *or Mi**o *ustom*rs only.*v*il**l* *or Mi**o *ustom*rs only.*v*il**l* *or Mi**o *ustom*rs only.*v*il**l* *or Mi**o *ustom*rs only.*v*il**l* *or Mi**o *ustom*rs only.*v*il**l* *or Mi**o *ustom*rs only.*v*il**l* *or Mi**o *ustom*rs only.*v*il**l* *or Mi**o *ustom*rs only.