{"id":"CVE-2026-111767","title":"MCP TypeScript SDK: Experimental tasks were not tied to the session that created them","summary":"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. Client…","severity":"high","cvss":8.6,"cvssVector":"CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:L/A:L","cvssSource":"cna","cwe":["CWE-639","CWE-862"],"vendor":"modelcontextprotocol","product":"typescript-sdk","affected":["typescript-sdk >= 1.24.0, < 1.32.0"],"ssvc":{"exploitation":"none","automatable":"yes","technicalImpact":"partial","timestamp":"2026-10-20T19:02:29.851772Z"},"published":"2026-10-20","updated":"2026-10-20","sourceUpdated":"2026-10-20T19:02:40.151Z","source":"CVEORG","sourceUrl":"https://www.cve.org/CVERecord?id=CVE-2026-111767","references":[{"url":"https://github.com/modelcontextprotocol/typescript-sdk/security/advisories/GHSA-22jm-h49p-29qw","label":"https://github.com/modelcontextprotocol/typescript-sdk/security/advisories/GHSA-22jm-h49p-29qw"},{"url":"https://github.com/modelcontextprotocol/typescript-sdk/pull/2925","label":"https://github.com/modelcontextprotocol/typescript-sdk/pull/2925"},{"url":"https://github.com/modelcontextprotocol/typescript-sdk/commit/727075b5bbeb77fbea22041b36b72a73042160fa","label":"https://github.com/modelcontextprotocol/typescript-sdk/commit/727075b5bbeb77fbea22041b36b72a73042160fa"},{"url":"https://github.com/advisories/GHSA-22jm-h49p-29qw"}],"tags":["cve.org","ghsa","npm"],"aliases":["GHSA-22jm-h49p-29qw"],"ecosystem":"npm","patched":["@modelcontextprotocol/sdk 1.32.0"],"ingestedAt":"2026-10-20T19:16:14.376Z","slug":"CVE-2026-111767","body":"## Overview\n\nMCP 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.\n\n## Affected\n\n- `typescript-sdk >= 1.24.0, < 1.32.0`\n\n## Remediation\n\nRefer to the linked advisories for vendor-supplied fixes and affected version ranges.\n\n## Package advisory (CVE-2026-111767)\n\nAffected packages:\n\n- `@modelcontextprotocol/sdk >= 1.24.0, < 1.32.0`\n\nPatched in:\n\n- `@modelcontextprotocol/sdk 1.32.0`\n\nSource: https://github.com/advisories/GHSA-22jm-h49p-29qw","depth":"twilight","depthScore":47,"depthScoreParts":{"impact":47.3,"likelihood":0,"exploitation":0,"ransomware":0},"changes":[]}