ImageMagick Heap-Buffer-Overflow in PCL Encode, Fixed in 7.1.2-16 & 6.9.13-41
CVE-2026-28686 Published on March 9, 2026
ImageMagick has a write heap-buffer-overflow in PCL encoder via undersized output buffer
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, A heap-buffer-overflow vulnerability exists in the PCL encode due to an undersized output buffer allocation. This vulnerability is fixed in 7.1.2-16 and 6.9.13-41.
Vulnerability Analysis
CVE-2026-28686 is exploitable with local system 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, with no impact on integrity, and a high impact on availability.
Weakness Types
Heap-based Buffer Overflow
A heap overflow condition is a buffer overflow, where the buffer that can be overwritten is allocated in the heap portion of memory, generally meaning that the buffer was allocated using a routine such as malloc().
Incorrect Calculation of Buffer Size
The software does not correctly calculate the size to be used when allocating a buffer, which could lead to a buffer overflow.
Products Associated with CVE-2026-28686
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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-2026-28686
| 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.