fix: create fresh Server per request in auth test helpers#141
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The auth test server helper and no-dns-rebinding-protection example reused a single Server instance across requests, calling connect() on each new transport. SDK v1.26.0's security fix (GHSA-345p-7cg4-v4c7) now throws "Already connected to a transport" in this case. Fix by wrapping Server creation in a factory function called per request, matching the pattern already used by tools_call.ts and everything-server.ts. Also updates no-dns-rebinding-protection.ts to use registerTool() instead of the deprecated tool() API. Co-Authored-By: Claude Opus 4.6 <noreply@anthropic.com>
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pcarleton
approved these changes
Feb 10, 2026
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Fixes auth test server and no-dns-rebinding-protection example reusing a single Server instance across requests, which breaks with SDK v1.26.0's security fix (GHSA-345p-7cg4-v4c7).
Motivation and Context
SDK v1.26.0 added a runtime guard that throws "Already connected to a transport" when
Protocol.connect()is called on an already-connected server. The auth test helper (createServer.ts) and theno-dns-rebinding-protection.tsexample both created a singleServer/McpServerat module scope and calledconnect()per request, triggering this guard.How Has This Been Tested?
Ran the v1.x client conformance tests with this fix installed locally —
tools_callscenario now passes (was failing with "Already connected" error).Breaking Changes
None — internal test infrastructure only.
Types of changes
Checklist