{"action":"Upgrade @modelcontextprotocol/server to 2.3.0 or later.","affected":[{"fixed":"2.3.0","introduced":"2.0.0"}],"component":"@modelcontextprotocol/server","cve_ids":["CVE-2026-111770"],"ecosystem":"npm","exploited":false,"fixed_versions":["2.3.0"],"ghsa_id":"GHSA-jm63-cq47-j5jp","id":"tcs_01M5JK8VQDKKQCDJ3DET6DF097","modified_at":"2026-10-20T20:15:05.217388038Z","published_at":"2026-10-20T20:07:29Z","references":["https://osv.dev/vulnerability/GHSA-jm63-cq47-j5jp","https://github.com/modelcontextprotocol/typescript-sdk/security/advisories/GHSA-jm63-cq47-j5jp","https://github.com/modelcontextprotocol/typescript-sdk/pull/2918","https://github.com/modelcontextprotocol/typescript-sdk/commit/84804c22e45a662675a198f853b7f00063838a8d","https://github.com/modelcontextprotocol/typescript-sdk"],"severity":{"label":"high","score":7.7},"sources":[{"source":"osv","source_id":"GHSA-jm63-cq47-j5jp","url":"https://osv.dev/vulnerability/GHSA-jm63-cq47-j5jp"}],"summary":"MCP TypeScript server SDK: Shared transport or server instances delivered one HTTP client's messages to another"}