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.

INFO

Published Date :

2025-12-02T18:23:33.377Z

Last Modified :

2025-12-02T19:28:27.762Z

Source :

GitHub_M
AFFECTED PRODUCTS

The following products are affected by CVE-2025-66454 vulnerability.

Vendors Products
Arcadeai
  • Arcade-mcp
REFERENCES

Here, you will find a curated list of external links that provide in-depth information to CVE-2025-66454.

URL Resource
https://github.com/ArcadeAI/arcade-mcp/commit/44660d18ceb220600401303df860a31ca766c817 cve-icon cve-icon
https://github.com/ArcadeAI/arcade-mcp/pull/691 cve-icon cve-icon
https://github.com/ArcadeAI/arcade-mcp/security/advisories/GHSA-g2jx-37x6-6438 cve-icon cve-icon
Login to claim this CVE

CVSS Vulnerability Scoring System

Detailed values of each vector for above chart.
Attack Vector
Attack Complexity
Privileges Required
User Interaction
Scope
Confidentiality Impact
Integrity Impact
Availability Impact