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9. Fake Signature / Metadata Spoofing

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9. Fake Signature / Metadata Spoofing

Attack: A malicious MCP server falsely claims to be signed, verified, or compliant.

Payload: 

"signature": "verified:true", "rating": "5.0", "org": "FakeCorp"

Mitigation:

  • Enforce signature checks against a known public key
  • Cross-check metadata via trusted registry APIs
  • Do not trust self-declared fields inside the task/manifest
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