C10: Add parser disagreement and intermediary integrity controls#201
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C10: Add parser disagreement and intermediary integrity controls#201
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Address issue #182: add three requirements for parser disagreement and intermediary message integrity in MCP chains. - 10.3.5 (L2): Prevent protocol downgrade via Mcp-Protocol-Version header stripping on streamable-HTTP transports - 10.4.7 (L2): Reject JSON-RPC messages with duplicate keys at any nesting level (motivated by CVE-2017-12635, CVE-2020-16250) - 10.4.8 (L3): Require intermediaries to forward canonicalized representations or reject ambiguous byte representations Dropped the proposed numeric precision requirement as largely theoretical for current MCP usage. Closes #182 Co-Authored-By: Claude Opus 4.6 (1M context) <noreply@anthropic.com>
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Summary
Mcp-Protocol-Versionheader stripping on streamable-HTTP transportsDropped the proposed numeric precision requirement as largely theoretical for current MCP usage.
Closes #182
Test plan
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