CVE-2026-53462: 
C# vulnerability analysis and mitigation

CVE-2026-53462 is a heap-use-after-free vulnerability in ImageMagick's CheckPrimitiveExtent function that can be triggered when a memory allocation fails, resulting in a crash. It affects ImageMagick versions prior to 6.9.13-50 (legacy branch) and prior to 7.1.2-25 (current branch). The vulnerability was published on June 10, 2026, and assigned a CVSS v3.1 base score of 5.9 (Medium) (GitHub Advisory).

The root cause is a use-after-free condition (CWE-416) in the CheckPrimitiveExtent function within ImageMagick's drawing/primitive processing code. When a memory allocation fails inside this function, the code continues to reference memory that has already been freed, leading to undefined behavior and a crash. The vulnerability is network-exploitable with high attack complexity and requires no privileges or user interaction — an attacker must supply a specially crafted image that triggers the allocation failure path. The advisory was published by maintainer dlemstra and credits reporter jeremybuis (GitHub Advisory).

Successful exploitation results in a Denial of Service (DoS) through an application crash. There is no impact on confidentiality or data integrity — the vulnerability is limited to availability. Services or applications that process untrusted images using ImageMagick (e.g., web applications, media pipelines) are at risk of being crashed by a malicious image submission, potentially causing service disruption (GitHub Advisory, Feedly).

There is no public proof-of-concept exploit and no evidence of in-the-wild exploitation at this time. The EPSS score is approximately 0.04%, indicating a very low probability of exploitation in the near term. The vulnerability has not been added to the CISA Known Exploited Vulnerabilities (KEV) catalog. The high attack complexity (requiring a specific allocation failure condition) further limits practical exploitability (GitHub Advisory).

Upgrade ImageMagick to version 6.9.13-50 or later (legacy branch) or 7.1.2-25 or later (current branch), which contain the fix for this vulnerability. If immediate patching is not feasible, restrict network access to any services that process untrusted images with ImageMagick, or disable image processing features where possible. Organizations should prioritize patching internet-facing services that accept user-supplied images (GitHub Advisory).