Skip to main content

Use of Hard-coded Cryptographic Key

CVE-2025-66454

Medium
6.5/10

Summary

Arcade MCP allows you to to create, deploy, and share MCP Servers. Prior to 1.9.1, the arcade-mcp HTTP server uses a hardcoded default worker secret ("dev") that is never validated or overridden during normal server startup. As a result, any unauthenticated attacker who knows this default key can forge valid JWTs and fully bypass the FastAPI authentication layer. This grants remote access to all worker endpointsincluding tool enumeration and tool invocationwithout credentials. This vulnerability is fixed in 1.9.1.

  • LOW
  • NETWORK
  • LOW
  • UNCHANGED
  • NONE
  • NONE
  • LOW
  • NONE

CWE-321 - Use of Hard-coded Cryptographic Key

The use of a hard-coded cryptographic key significantly increases the possibility that encrypted data may be recovered.

References

Advisory Timeline

  • Published