Description
Arcade MCP allows you to to create, deploy, and share MCP Servers. Prior to 1.5.4, 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 endpoints—including tool enumeration and tool invocation—without credentials. This vulnerability is fixed in 1.5.4.
Problem types
CWE-321: Use of Hard-coded Cryptographic Key
CWE-798: Use of Hard-coded Credentials
Product status
References
github.com/...de-mcp/security/advisories/GHSA-g2jx-37x6-6438
github.com/ArcadeAI/arcade-mcp/pull/691
github.com/...ommit/44660d18ceb220600401303df860a31ca766c817
