CVE-2026-63127

A flaw was found in rmcp, a Rust SDK for the Model Context Protocol. The OAuth implementation in rmcp omits the RFC 9728 resource field from ResourceServerMetadata. This allows a malicious Model Context Protocol MCP server to publish metadata for a different legitimate MCP resource. Consequently,...

CVE-2026-63127

RMCP is the official Rust SDK for the Model Context Protocol . Prior to version 2.0.0 , the rmcp crate's OAuth implementation in crates/rmcp/src/transport/auth.rs omits the RFC 9728 resource field from ResourceServerMetadata and allows discover_oauth_server_via_resource_metadata to use protected-...

PT-2026-93788

Name of the Vulnerable Software and Affected Versions rmcp versions prior to 2.0.0 Description The OAuth implementation in the rmcp crate fails to validate the resource parameter in OAuth Protected Resource metadata as required by RFC 9728. Specifically, the ResourceServerMetadata struct omits th...

CVE-2026-63127: Insufficient Verification of Data Authenticity

RMCP is an official Rust SDK for the Model Context Protocol. Prior to 2.0.0, the rmcp crate's OAuth implementation in crates/rmcp/src/transport/auth.rs omits the RFC 9728 resource field from ResourceServerMetadata and allows discoveroauthserverviaresourcemetadata to use protected-resource metadat...

Linux Distros Unpatched Vulnerability : CVE-2026-63127

The Linux/Unix host has one or more packages installed that are impacted by a vulnerability without a vendor supplied patch available. - RMCP is an official Rust SDK for the Model Context Protocol. Prior to 2.0.0, the rmcp crate's OAuth implementation in crates/rmcp/src/transport/auth.rs omits th...