{"action":"Upgrade rmcp to 2.0.0 or later.","affected":[{"fixed":"2.0.0","introduced":"0"}],"component":"rmcp","cve_ids":["CVE-2026-63128"],"ecosystem":"crates.io","epss":0.00535,"exploited":false,"fixed_versions":["2.0.0"],"ghsa_id":"GHSA-9pj6-vhgr-3mwh","id":"tcs_01M5KEWGEGPQT22F00CVN8DCTF","modified_at":"2026-09-16T22:30:08.343637534Z","published_at":"2026-09-16T22:13:34Z","references":["https://osv.dev/vulnerability/GHSA-9pj6-vhgr-3mwh","https://github.com/modelcontextprotocol/rust-sdk/security/advisories/GHSA-9pj6-vhgr-3mwh","https://nvd.nist.gov/vuln/detail/CVE-2026-63128","https://github.com/modelcontextprotocol/rust-sdk/pull/934","https://github.com/modelcontextprotocol/rust-sdk/commit/dfa7fd6f9309deab60bea230b041be9a3fcda846","https://github.com/modelcontextprotocol/rust-sdk","https://github.com/modelcontextprotocol/rust-sdk/releases/tag/rmcp-v2.0.0"],"severity":{"label":"high","score":7.5},"sources":[{"source":"osv","source_id":"GHSA-9pj6-vhgr-3mwh","url":"https://osv.dev/vulnerability/GHSA-9pj6-vhgr-3mwh"}],"summary":"RMCP: Unauthenticated permanent session-table leak in rmcp Streamable HTTP server transport leads to remote denial-of-service"}