Magick.NET CVE-2026-62363

Exploitation requires a user or application to process a crafted image or argument with a vulnerable Magick.NET installation. The attacker must be able to supply the malicious content; this may occur via file upload, image URL, or other input channels. No special configuration is needed-any application using an affected NuGet package with the fx operation enabled is susceptible. The CVSS vector indicates low privileges are required, meaning an attacker with limited system access could trigger the issue by substituting a malicious file.

The CVSS 3.1 vector (AV:L/AC:L/PR:L/UI:R/S:U/C:N/I:N/A:H) indicates a local attack requiring low privileges and user interaction, with only availability impact (denial of service). No EPSS exploitation probability is available, but the absence of CISA KEV listing and any public exploit suggests exploitation is not widespread. The SSVC decision framework (assuming no automation and partial technical impact) would likely classify this as a lower-priority patching candidate. The risk is moderate: the vulnerability can cause crashes but does not compromise confidentiality or integrity, and exploitation requires opening a crafted file. However, because Magick.NET is used in server-side image processing, a denial-of-service scenario could affect application availability. The primary signal for action is the vendor-provided patch, not an imminent threat.

An attacker crafts an image file or request containing a malicious argument that exploits the fx operation heap buffer over-write. When a user or service utilizing a vulnerable Magick.NET version processes the crafted input, the out-of-bounds write corrupts the heap, leading to a crash or denial of service. No public exploit code is known, but a skilled attacker could develop a reliable proof-of-concept based on the advisory details.