CVE-2026-24484: 
C# vulnerability analysis and mitigation

CVE-2026-24484 is a Denial of Service vulnerability in ImageMagick caused by uncontrolled resource consumption when processing multi-layer nested MVG (Magick Vector Graphics) to SVG (Scalable Vector Graphics) conversions. Discovered by researcher ylwango613 and disclosed on February 23–24, 2026, it affects ImageMagick versions prior to 7.1.2-15 and 6.9.13-40, as well as Magick.NET (the .NET wrapper) versions prior to 14.10.3. It carries a CVSS v3.1 base score of 5.3 (Medium) (GitHub Advisory, Github Advisory DB).

The root cause is classified as CWE-400 (Uncontrolled Resource Consumption) and CWE-1284 (Improper Validation of Specified Quantity in Input). ImageMagick's SVG writer (coders/svg.c) failed to enforce a recursion depth limit when processing graphic-context tokens during MVG-to-SVG conversion, allowing deeply nested MVG structures to consume excessive resources. The fix, applied in commit 0349df6, adds a check against MagickMaxRecursionDepth and throws a VectorGraphicsNestedTooDeeply error when the limit is exceeded. No authentication or user interaction is required — an attacker only needs to supply a crafted image file to a vulnerable ImageMagick instance (GitHub Commit, GitHub Advisory).

Successful exploitation results in a Denial of Service condition, causing the ImageMagick process to become unresponsive or crash, making image processing services unavailable to legitimate users. There is no impact on confidentiality or data integrity — the vulnerability is limited to availability. Any application or service that accepts user-supplied image files and processes them with a vulnerable version of ImageMagick or Magick.NET is at risk, including web applications, content management systems, and media pipelines (Github Advisory DB, Red Hat Bugzilla).

1. Craft a malicious MVG file: Create an MVG image file containing deeply nested graphic-context blocks that exceed the recursion depth limit, designed to trigger uncontrolled resource consumption during SVG conversion.
2. Deliver the file to the target: Submit the crafted MVG file to any service or application that processes user-supplied images using a vulnerable version of ImageMagick (prior to 7.1.2-15 or 6.9.13-40) or Magick.NET (prior to 14.10.3). This could be via a file upload form, API endpoint, or any other image ingestion mechanism.
3. Trigger MVG-to-SVG conversion: Ensure the application invokes ImageMagick's SVG writer on the malicious file, either directly or through format conversion (e.g., converting an MVG input to SVG output).
4. Achieve DoS: The unguarded recursion in coders/svg.c causes excessive resource consumption, resulting in the ImageMagick process hanging or crashing, denying service to legitimate users (GitHub Commit, GitHub Advisory).

• Process: ImageMagick worker processes (convert, magick) consuming abnormally high CPU or memory when processing MVG or SVG files; processes hanging indefinitely without completing.
• Logs: Application or system logs showing ImageMagick crashes, timeouts, or error messages such as VectorGraphicsNestedTooDeeply (patched versions) or unexplained process terminations on image conversion tasks.
• File System: Presence of deeply nested or unusually large MVG files in upload directories or temporary processing folders.
• Network: Repeated submission of MVG-format files or files triggering SVG conversion from the same source IP, particularly if accompanied by service degradation.

Upgrade ImageMagick to version 7.1.2-15 or later (for the 7.x branch) or 6.9.13-40 or later (for the 6.x branch). Magick.NET users should upgrade to version 14.10.3 or later. As a workaround, consider disabling MVG-to-SVG conversion functionality if not required by your application, and implement network-level controls to restrict which file types are accepted for processing. Filtering image uploads from untrusted sources and monitoring system resource consumption for anomalies are also recommended interim measures (GitHub Advisory, Magick.NET Release, Red Hat Bugzilla).

The vulnerability was addressed promptly by the ImageMagick maintainers with patches released alongside disclosure. Red Hat tracked the issue via their security advisory system (Bugzilla bug 2442085), and downstream Linux distributions including SUSE, Debian, and Ubuntu issued security updates. No significant public researcher commentary or social media discussion beyond standard advisory propagation has been observed for this moderate-severity DoS issue (Red Hat Bugzilla, Github Advisory DB).