Potential.NET XML Denial of Service Vulnerability Under Investigation
An early warning has been issued regarding a potential denial of service vulnerability in.NET XML processing, reportedly affecting specific versions of System.Security.Cryptography.Xml and various Microsoft.NetCore.App.Runtime components.
What happened
An early warning has been issued about a potential denial of service vulnerability (CVE-2026-47302, GHSA-CVVH-RHRC-WG4Q) in.NET XML processing. The vulnerability appears to exist in the XML encryption handling within XML parsing, which could be exploited to cause excessive resource consumption or application crashes. The affected components include System.Security.Cryptography.Xml (nuget) versions >=10.0.0,<=10.0.9 and several Microsoft.NetCore.App.Runtime components for Linux ARM architectures within the same version range.
Professional software engineers are advised to review their dependencies and assess whether their applications utilize any of the affected components. The primary sources indicate that upgrading to patched versions of the affected packages is recommended as a precautionary measure. Further details about the patched versions and the exact nature of the vulnerability are under investigation. For the most current information, consulting the primary sources is advised.
How 0Day mitigates this
System.Security.Cryptography.Xml is anywhere in your dependency tree, the engineers who own the affected repositories get a push alert the moment it is flagged — no manual audit to remember to run.Read how this differs from waiting on a scanner to catch a known advisory, or see the exact, read-only access 0Day needs to do this for an organization.