{"action":"Upgrade @modelcontextprotocol/sdk to 1.26.0 or later.","affected":[{"fixed":"1.26.0","introduced":"1.10.0"}],"component":"@modelcontextprotocol/sdk","cve_ids":["CVE-2026-25536"],"ecosystem":"npm","epss":0.00293,"exploited":false,"fixed_versions":["1.26.0"],"ghsa_id":"GHSA-345p-7cg4-v4c7","id":"tcs_01M5KEVVEECSXF5JHF9CGA8TZY","modified_at":"2026-09-10T03:50:33.823318085Z","published_at":"2026-02-04T20:04:16Z","references":["https://osv.dev/vulnerability/GHSA-345p-7cg4-v4c7","https://github.com/modelcontextprotocol/typescript-sdk/security/advisories/GHSA-345p-7cg4-v4c7","https://nvd.nist.gov/vuln/detail/CVE-2026-25536","https://github.com/modelcontextprotocol/typescript-sdk/issues/204","https://github.com/modelcontextprotocol/typescript-sdk/issues/243","https://github.com/modelcontextprotocol/typescript-sdk"],"severity":{"label":"high","score":7.1},"sources":[{"source":"osv","source_id":"GHSA-345p-7cg4-v4c7","url":"https://osv.dev/vulnerability/GHSA-345p-7cg4-v4c7"}],"summary":"@modelcontextprotocol/sdk has cross-client data leak via shared server/transport instance reuse"}