ImageMagick XWD Encoder Overflow (<7.1.2-16, <6.9.13-41)
CVE-2026-30937 Published on March 9, 2026

ImageMagick has a heap buffer overflow in WriteXWDImage due to CARD32 arithmetic overflow in bytes_per_line calculation
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 32-bit unsigned integer overflow in the XWD (X Windows) encoder can cause an undersized heap buffer allocation. When writing a extremely large image an out of bounds heap write can occur. This vulnerability is fixed in 7.1.2-16 and 6.9.13-41.

Github Repository NVD

Vulnerability Analysis

CVE-2026-30937 can be exploited 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.

Attack Vector:
LOCAL
Attack Complexity:
LOW
Privileges Required:
NONE
User Interaction:
NONE
Scope:
UNCHANGED
Confidentiality Impact:
NONE
Integrity Impact:
LOW
Availability Impact:
HIGH

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().

Integer Overflow or Wraparound

The software performs a calculation that can produce an integer overflow or wraparound, when the logic assumes that the resulting value will always be larger than the original value. This can introduce other weaknesses when the calculation is used for resource management or execution control. An integer overflow or wraparound occurs when an integer value is incremented to a value that is too large to store in the associated representation. When this occurs, the value may wrap to become a very small or negative number. While this may be intended behavior in circumstances that rely on wrapping, it can have security consequences if the wrap is unexpected. This is especially the case if the integer overflow can be triggered using user-supplied inputs. This becomes security-critical when the result is used to control looping, make a security decision, or determine the offset or size in behaviors such as memory allocation, copying, concatenation, etc.


Products Associated with CVE-2026-30937

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ImageMagick
 

Affected Versions

ImageMagick:

Vulnerable Packages

The following package name and versions may be associated with CVE-2026-30937

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
0.01%
Percentile
2.70%

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.