{"id":"CVE-2026-111767","state":"PUBLISHED","title":"MCP TypeScript SDK: Experimental tasks were not tied to the session that created them","description":"MCP TypeScript SDK is the official TypeScript SDK for Model Context Protocol servers and clients. From version 1.24.0 to before version 1.32.0, 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. This issue has been patched in version 1.32.0.","publishedAt":"2026-10-20T18:28:45.650Z","updatedAt":"2026-10-20T19:02:40.151Z","severity":{"score":8.6,"label":"High","version":"3.1","vector":"CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:L/A:L","source":"GitHub_M"},"assigner":"GitHub_M","products":["modelcontextprotocol typescript-sdk"],"affected":[{"vendor":"modelcontextprotocol","product":"typescript-sdk","versions":[{"version":">= 1.24.0, < 1.32.0","status":"affected"}]}],"references":["https://github.com/modelcontextprotocol/typescript-sdk/security/advisories/GHSA-22jm-h49p-29qw","https://github.com/modelcontextprotocol/typescript-sdk/pull/2925","https://github.com/modelcontextprotocol/typescript-sdk/commit/727075b5bbeb77fbea22041b36b72a73042160fa"],"weaknesses":["CWE-639","CWE-862"],"ingestedAt":"2026-10-29T20:10:33.477Z","source":{"repository":"CVEProject/cvelistV5","path":"cves/2026/111xxx/CVE-2026-111767.json","commit":"556c9d3a8cd17e218bb8e452ba7cd619a384ff47"},"raw":{"dataType":"CVE_RECORD","dataVersion":"5.2","cveMetadata":{"cveId":"CVE-2026-111767","state":"PUBLISHED","datePublished":"2026-10-20T18:28:45.650Z","dateUpdated":"2026-10-20T19:02:40.151Z","assignerShortName":"GitHub_M","assignerOrgId":"a0819718-46f1-4df5-94e2-005712e83aaa","dateReserved":"2026-10-16T17:52:09.082Z"},"containers":{"cna":{"title":"MCP TypeScript SDK: Experimental tasks were not tied to the session that created them","descriptions":[{"lang":"en","value":"MCP TypeScript SDK is the official TypeScript SDK for Model Context Protocol servers and clients. From version 1.24.0 to before version 1.32.0, 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. This issue has been patched in version 1.32.0."}],"affected":[{"vendor":"modelcontextprotocol","product":"typescript-sdk","versions":[{"version":">= 1.24.0, < 1.32.0","status":"affected"}]}],"references":[{"url":"https://github.com/modelcontextprotocol/typescript-sdk/security/advisories/GHSA-22jm-h49p-29qw","name":"https://github.com/modelcontextprotocol/typescript-sdk/security/advisories/GHSA-22jm-h49p-29qw","tags":["x_refsource_CONFIRM"]},{"url":"https://github.com/modelcontextprotocol/typescript-sdk/pull/2925","name":"https://github.com/modelcontextprotocol/typescript-sdk/pull/2925","tags":["x_refsource_MISC"]},{"url":"https://github.com/modelcontextprotocol/typescript-sdk/commit/727075b5bbeb77fbea22041b36b72a73042160fa","name":"https://github.com/modelcontextprotocol/typescript-sdk/commit/727075b5bbeb77fbea22041b36b72a73042160fa","tags":["x_refsource_MISC"]}],"metrics":[{"cvssV3_1":{"attackComplexity":"LOW","attackVector":"NETWORK","availabilityImpact":"LOW","baseScore":8.6,"baseSeverity":"HIGH","confidentialityImpact":"HIGH","integrityImpact":"LOW","privilegesRequired":"NONE","scope":"UNCHANGED","userInteraction":"NONE","vectorString":"CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:L/A:L","version":"3.1"}}],"problemTypes":[{"descriptions":[{"cweId":"CWE-639","lang":"en","description":"CWE-639: Authorization Bypass Through User-Controlled Key","type":"CWE"}]},{"descriptions":[{"cweId":"CWE-862","lang":"en","description":"CWE-862: Missing Authorization","type":"CWE"}]}],"providerMetadata":{"shortName":"GitHub_M","orgId":"a0819718-46f1-4df5-94e2-005712e83aaa","dateUpdated":"2026-10-20T18:28:45.650Z"},"source":{"advisory":"GHSA-22jm-h49p-29qw","discovery":"UNKNOWN"}},"adp":[{"title":"CISA ADP Vulnrichment","metrics":[{"other":{"type":"ssvc","content":{"timestamp":"2026-10-20T19:02:29.851772Z","id":"CVE-2026-111767","options":[{"Exploitation":"none"},{"Automatable":"yes"},{"Technical Impact":"partial"}],"role":"CISA Coordinator","version":"2.0.3"}}}],"providerMetadata":{"shortName":"CISA-ADP","orgId":"134c704f-9b21-4f2e-91b3-4a467353bcc0","dateUpdated":"2026-10-20T19:02:40.151Z"}}]}}}