CVE-2026-63127 RMCP: Missing Resource Field Validation in OAuth Protected Resource Metadata Discovery

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...

CVE-2026-79662 Ech0 before 4.7.3 OAuth Redirect URI Validation Bypass

Ech0 through 4.5.6 contains an OAuth redirect URI validation vulnerability in parseAndValidateClientRedirect internal/service/auth/auth.go that compares only the scheme and host of the client-supplied redirecturi against the admin-configured allowlist, ignoring path, query, and fragment component...

CVE-2025-4143 Missing validation of redirect_uri on authorize endpoint

The OAuth implementation in workers-oauth-provider that is part of MCP framework https://github.com/cloudflare/workers-mcp , did not correctly validate that redirecturi was on the allowed list of redirect URIs for the given client registration. Fixed in: ...