MCP SDK OAuth Client Credentials Not Bound to Authorization Server Vulnerability
Security Advisory
High
modelcontextprotocol
Affected:
- @modelcontextprotocol/client (npm): >= 2.0.0, < 2.2.0
- @modelcontextprotocol/sdk (npm): >= 1.12.0, < 1.31.0
Fixed in:
- @modelcontextprotocol/sdk >= 1.31.0
- @modelcontextprotocol/client >= 2.2.0
- @modelcontextprotocol/core >= 2.0.0
Referenced CVEs:
CVE-2026-104850 · 7.5
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