{"schema":"threatline.record/2","record":{"id":"CVE-2026-111767","aliases":["GHSA-22jm-h49p-29qw"],"summary":"MCP TypeScript SDK: Experimental tasks were not tied to the session that created them","details":"### Summary\nIn affected versions, the experimental tasks feature (`taskStore`) did not check which session created a task. Clients sharing one `InMemoryTaskStore` could list, read and cancel each other's tasks.\n\nExperimental tasks are deprecated. The 2026-07-28 specification replaced them with a redesigned extension. The best course of action is to stop using them.\n\n### Am I affected?\nOnly if your HTTP server passes `taskStore` to `McpServer` or `Server`. If `grep -ri taskstore --exclude-dir=node_modules .` finds nothing, you are not affected.\n\nAffected versions: `@modelcontextprotocol/sdk` 1.24.0 through 1.31.0. The 2.x packages are not affected.\n\n### Fix\nUpgrade to `@modelcontextprotocol/sdk` 1.32.0 or later. Each task is now tied to the session that created it, so a client that starts a new session can no longer reach its earlier tasks.\n\nIf you cannot upgrade yet, remove `taskStore`, or create one `InMemoryTaskStore` per session.","categories":["Libraries & packages"],"product":"@modelcontextprotocol/sdk","vendor":"modelcontextprotocol","ecosystem":"npm","affected_ranges":[{"source":"GitHub Advisory Database","source_url":"https://github.com/advisories/GHSA-22jm-h49p-29qw","source_modified_at":"2026-10-20T18:26:55Z","fetched_at":"2026-10-23T18:42:43.628194Z","package":{"ecosystem":"npm","name":"@modelcontextprotocol/sdk"},"range":">= 1.24.0, < 1.32.0"},{"source":"CVE List","source_url":"https://www.cve.org/CVERecord?id=CVE-2026-111767","source_modified_at":"2026-10-20T19:02:40.151Z","fetched_at":"2026-10-23T18:45:31.882637Z","product":"typescript-sdk","vendor":"modelcontextprotocol","versions":[{"status":"affected","version":">= 1.24.0, < 1.32.0"}],"defaultStatus":null},{"source":"OSV","source_url":"https://osv.dev/vulnerability/GHSA-22jm-h49p-29qw","source_modified_at":"2026-10-20T18:45:09.486849334Z","fetched_at":"2026-10-23T18:52:38.922436Z","package":{"name":"@modelcontextprotocol/sdk","ecosystem":"npm","purl":"pkg:npm/%40modelcontextprotocol/sdk"},"ranges":[{"type":"SEMVER","events":[{"introduced":"1.24.0"},{"fixed":"1.32.0"}]}],"versions":[]}],"fixed_versions":[{"source":"GitHub Advisory Database","source_url":"https://github.com/advisories/GHSA-22jm-h49p-29qw","source_modified_at":"2026-10-20T18:26:55Z","fetched_at":"2026-10-23T18:42:43.628194Z","package":{"ecosystem":"npm","name":"@modelcontextprotocol/sdk"},"version":"1.32.0"},{"source":"OSV","source_url":"https://osv.dev/vulnerability/GHSA-22jm-h49p-29qw","source_modified_at":"2026-10-20T18:45:09.486849334Z","fetched_at":"2026-10-23T18:52:38.922436Z","package":{"name":"@modelcontextprotocol/sdk","ecosystem":"npm","purl":"pkg:npm/%40modelcontextprotocol/sdk"},"version":"1.32.0"}],"cvss":8.6,"severity":"High","kev":{"listed":false},"epss":{"probability":0.00345,"percentile":0.26807,"score_date":"2026-10-23"},"published_at":"2026-10-20T18:28:45.650Z","modified_at":"2026-10-20T19:02:40.151Z","provenance":[{"source":"GitHub Advisory Database","url":"https://github.com/advisories/GHSA-22jm-h49p-29qw","fetched_at":"2026-10-23T18:42:43.628194Z","source_modified_at":"2026-10-20T18:26:55Z"},{"source":"CVE List","url":"https://www.cve.org/CVERecord?id=CVE-2026-111767","fetched_at":"2026-10-23T18:45:31.882637Z","source_modified_at":"2026-10-20T19:02:40.151Z"},{"source":"OSV","url":"https://osv.dev/vulnerability/GHSA-22jm-h49p-29qw","fetched_at":"2026-10-23T18:52:38.922436Z","source_modified_at":"2026-10-20T18:45:09.486849334Z"},{"source":"EPSS","url":"https://api.first.org/data/v1/epss?cve=CVE-2026-111767","fetched_at":"2026-10-23T18:42:43.628194Z","source_modified_at":"2026-10-23"}],"sources":["GitHub Advisory Database","CVE List","OSV","EPSS"],"references":[{"source":"CVE List","url":"https://github.com/modelcontextprotocol/typescript-sdk/security/advisories/GHSA-22jm-h49p-29qw","tags":["x_refsource_CONFIRM"]},{"source":"CVE List","url":"https://github.com/modelcontextprotocol/typescript-sdk/pull/2925","tags":["x_refsource_MISC"]},{"source":"CVE List","url":"https://github.com/modelcontextprotocol/typescript-sdk/commit/727075b5bbeb77fbea22041b36b72a73042160fa","tags":["x_refsource_MISC"]},{"url":"https://github.com/advisories/GHSA-22jm-h49p-29qw","source":"GitHub Advisory Database"}],"locations":[],"motoko_assessment":{"status":"requires_architecture_review","automatic_remediation":false},"cve_state":"PUBLISHED","ssvc":{"exploitation":"none","automatable":"yes","technical_impact":"partial","assessed_at":"2026-10-20T19:02:29.851772Z"},"classification":{"method":"product-first software-layer rules","rules_version":"2.1","matched_on":"ecosystem","confidence":"heuristic","reviewed":false},"change_timestamp":"2026-10-20T19:02:40.151Z","content_hash":"6e8bc9ee7d95bb961947554074975abcdcbab70db8f01289b31207bee85b86a7"}}