{"action":"Upgrade rmcp to 2.0.0 or later.","affected":[{"fixed":"2.0.0","introduced":"0"}],"component":"rmcp","cve_ids":["CVE-2026-63127"],"ecosystem":"crates.io","epss":0.00195,"exploited":false,"fixed_versions":["2.0.0"],"ghsa_id":"GHSA-33f5-2c5q-wgwj","id":"tcs_01M5KERPG7H6ZAXWFJAGYKJ57C","modified_at":"2026-09-16T22:30:08.107391372Z","published_at":"2026-09-16T22:13:26Z","references":["https://osv.dev/vulnerability/GHSA-33f5-2c5q-wgwj","https://github.com/modelcontextprotocol/rust-sdk/security/advisories/GHSA-33f5-2c5q-wgwj","https://nvd.nist.gov/vuln/detail/CVE-2026-63127","https://github.com/modelcontextprotocol/rust-sdk/pull/937","https://github.com/modelcontextprotocol/rust-sdk/commit/c1a8b29ff2cc45e7820b900dae42cbb4958089ec","https://github.com/modelcontextprotocol/rust-sdk","https://github.com/modelcontextprotocol/rust-sdk/releases/tag/rmcp-v2.0.0"],"severity":{"label":"high","score":8.2},"sources":[{"source":"osv","source_id":"GHSA-33f5-2c5q-wgwj","url":"https://osv.dev/vulnerability/GHSA-33f5-2c5q-wgwj"}],"summary":"RMCP: Missing Resource Field Validation in OAuth Protected Resource Metadata Discovery"}