ImageMagick JBIG Decoder Uninit Pointer Deref CVE-2026-28691 (before 7.1.2-16,6.9.13-41)
CVE-2026-28691 Published on March 9, 2026
ImageMagick has an uninitialized pointer dereference in JBIG decoder
ImageMagick is free and open-source software used for editing and manipulating digital images. Prior to versions 7.1.2-16 and 6.9.13-41, an uninitialized pointer dereference vulnerability exists in the JBIG decoder due to a missing check. This vulnerability is fixed in 7.1.2-16 and 6.9.13-41.
Vulnerability Analysis
CVE-2026-28691 can be exploited with network access, and does not require authorization privileges or user interaction. This vulnerability is considered to have a low attack complexity. The potential impact of an exploit of this vulnerability is considered to have no impact on confidentiality and integrity, and a high impact on availability.
Weakness Types
Unchecked Return Value
The software does not check the return value from a method or function, which can prevent it from detecting unexpected states and conditions. Two common programmer assumptions are "this function call can never fail" and "it doesn't matter if this function call fails". If an attacker can force the function to fail or otherwise return a value that is not expected, then the subsequent program logic could lead to a vulnerability, because the software is not in a state that the programmer assumes. For example, if the program calls a function to drop privileges but does not check the return code to ensure that privileges were successfully dropped, then the program will continue to operate with the higher privileges.
Access of Uninitialized Pointer
The program accesses or uses a pointer that has not been initialized.
Products Associated with CVE-2026-28691
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Affected Versions
ImageMagick:- Version >= 7.0.0, < 7.1.2-16 is affected.
- Version < 6.9.13-41 is affected.
Vulnerable Packages
The following package name and versions may be associated with CVE-2026-28691
| Package Manager | Vulnerable Package | Versions | Fixed In |
|---|---|---|---|
| nuget | Magick.NET-Q8-x86 | < 14.10.4 | 14.10.4 |
| nuget | Magick.NET-Q8-x64 | < 14.10.4 | 14.10.4 |
| nuget | Magick.NET-Q8-arm64 | < 14.10.4 | 14.10.4 |
| nuget | Magick.NET-Q8-OpenMP-x64 | < 14.10.4 | 14.10.4 |
| nuget | Magick.NET-Q8-OpenMP-arm64 | < 14.10.4 | 14.10.4 |
| nuget | Magick.NET-Q8-AnyCPU | < 14.10.4 | 14.10.4 |
| nuget | Magick.NET-Q16-HDRI-OpenMP-x64 | < 14.10.4 | 14.10.4 |
| nuget | Magick.NET-Q16-x86 | < 14.10.4 | 14.10.4 |
| nuget | Magick.NET-Q16-x64 | < 14.10.4 | 14.10.4 |
| nuget | Magick.NET-Q16-arm64 | < 14.10.4 | 14.10.4 |
| nuget | Magick.NET-Q16-OpenMP-x86 | < 14.10.4 | 14.10.4 |
| nuget | Magick.NET-Q16-OpenMP-x64 | < 14.10.4 | 14.10.4 |
| nuget | Magick.NET-Q16-OpenMP-arm64 | < 14.10.4 | 14.10.4 |
| nuget | Magick.NET-Q16-HDRI-x86 | < 14.10.4 | 14.10.4 |
| nuget | Magick.NET-Q16-HDRI-x64 | < 14.10.4 | 14.10.4 |
| nuget | Magick.NET-Q16-HDRI-arm64 | < 14.10.4 | 14.10.4 |
| nuget | Magick.NET-Q16-HDRI-OpenMP-arm64 | < 14.10.4 | 14.10.4 |
| nuget | Magick.NET-Q16-HDRI-AnyCPU | < 14.10.4 | 14.10.4 |
| nuget | Magick.NET-Q16-AnyCPU | < 14.10.4 | 14.10.4 |
Exploit Probability
EPSS (Exploit Prediction Scoring System) scores estimate the probability that a vulnerability will be exploited in the wild within the next 30 days. The percentile shows you how this score compares to all other vulnerabilities.