CVE-2026-106574 in ImageMagick
Summary
by MITRE • 10/07/2026
ImageMagick is free and open-source software used for editing and manipulating digital images. Prior to 7.1.2-31, a client connected to the distributed pixel cache server can send crafted pixel data that triggers an integer-size calculation error and a heap buffer overwrite, crashing the server. This issue is fixed in version 7.1.2-31.
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Analysis
by VulDB Data Team • 10/07/2026
ImageMagick serves as a foundational toolset for digital image processing across numerous software ecosystems, enabling operations such as format conversion, resizing, and color manipulation. The vulnerability identified affects the distributed pixel cache server component of ImageMagick prior to version 7.1.2-31. This specific subsystem is designed to facilitate high-performance image processing by distributing computational loads across multiple nodes in a cluster environment. By offloading intensive tasks like decoding complex images or applying heavy filters, the distributed architecture aims to improve throughput and reduce latency for large-scale applications. However, this architectural complexity introduces attack surfaces that require rigorous input validation and memory management safeguards.
The core technical flaw resides within the handling of pixel data received from clients connecting to the distributed pixel cache server. Specifically, when a client transmits crafted or malformed pixel data, it triggers an integer-size calculation error during the processing pipeline. This arithmetic miscalculation typically involves incorrect computation of buffer sizes based on image dimensions or channel counts provided in the input stream. Because the calculated size is smaller than the actual amount of data being processed or written, subsequent memory allocation operations fail to reserve sufficient heap space. Consequently, when the system attempts to write the pixel data into the allocated buffer, it exceeds the boundaries of the reserved memory region. This condition results in a heap buffer overwrite, where adjacent memory structures are corrupted with unintended data values derived from the malicious input payload.
The operational impact of this vulnerability is primarily characterized by service disruption through denial-of-service conditions. The heap corruption caused by the buffer overflow leads to immediate instability within the ImageMagick process hosting the distributed pixel cache server. In most execution environments, such memory violations trigger segmentation faults or critical runtime errors that cause the server application to crash abruptly. For organizations relying on high-availability image processing pipelines, this means a sudden loss of service capability for any client attempting to utilize the distributed caching functionality. While heap overflows can sometimes lead to arbitrary code execution if specific exploitation techniques are applied and memory layout conditions align, in this context involving the cache server architecture, the most immediate and consistent outcome is process termination rather than remote code execution.
From a classification perspective, this vulnerability maps directly to CWE-190 Integer Overflow or Wraparound as the root cause of the miscalculation that leads to insufficient buffer allocation. The resulting memory corruption aligns with CWE-787 Out-of-bounds Write, which describes writing data beyond the intended boundary of a buffer in heap memory. In terms of adversarial tactics and techniques, this exploitation vector corresponds to ATT&CK technique T1496 Resource Hijacking via Denial of Service, as an attacker can leverage this flaw to exhaust system resources by repeatedly crashing the service node. It also touches upon T1059 Command Line Interface if the crash leads to secondary effects in orchestration layers that monitor process health and restart services automatically.
Mitigation strategies focus primarily on version management and architectural hardening. The definitive remediation is to upgrade ImageMagick to version 7.1.2-31 or later, where the developers have implemented proper bounds checking and corrected the integer arithmetic logic within the distributed pixel cache module. Organizations should also audit their deployment configurations to ensure that no legacy versions remain in production environments. Additionally, implementing network-level access controls can limit exposure by restricting connections to the distributed pixel cache server only from trusted internal subnets or specific application servers. Deploying intrusion detection systems capable of identifying anomalous memory allocation patterns or unusual traffic volumes directed at image processing endpoints may provide early warning indicators for attempted exploitation before a crash occurs. Regular patch management cycles and automated vulnerability scanning against known CVE databases are essential practices to maintain the integrity of infrastructure relying on ImageMagick services.