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CVE-2026-63118: Mcp Streamable Http Missing Host Origin Validationcve-2026-63118-mcp-streamable-http-missing-host-origin-validation

MCP HTTP transport does not validate Host or Origin headers before handling requests, which may allow DNS rebinding and cross-origin attacks against locally running servers.

RubyCVE-2026-63118 CWE-346 CWE-350

by Provallyupdated 2026-09-02Apache-2.0

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