MCP TypeScript SDK: Experimental tasks were not tied to the session that created them

Date Oct 20, 2026
Type Vendor advisory
Signal High-risk advisory
Vendor / Product npm ยท @modelcontextprotocol/sdk
CVE CVE-2026-111767
High-risk advisory CVE-2026-111767

Summary

MCP TypeScript SDK: Experimental tasks were not tied to the session that created them

Why it matters

GitHub has published a reviewed security advisory for @modelcontextprotocol/sdk. Prioritize it with other application dependency updates.

Operator check

Check whether @modelcontextprotocol/sdk is present in application dependency manifests, lockfiles, or build images. Review the GitHub advisory and upgrade to a patched version where available.

Sources

PatchBrief uses public sources. It does not scan environments, verify exposure, or replace vendor guidance.