Arcade MCP Default Hardcoded Worker Secret Allows Full Unauthorized Access to All HTTP MCP Worker Endpoints
Default status is the baseline for the product, each version can override it (e.g. patched versions marked unaffected).
| Vendor | Product | Default status | Versions | ||||||
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| ArcadeAI | arcade-mcp | affected |
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| Vendor | Product | Versions |
|---|---|---|
| Arcadeai | Arcade-mcp | — |
| Source | ID | Title |
|---|---|---|
Github GHSA |
GHSA-g2jx-37x6-6438 | arcade-mcp-server Has Default Hardcoded Worker Secret That Allows Full Unauthorized Access to All HTTP MCP Worker Endpoints |
No CVSS v4.0
No CVSS v3.0
No CVSS v2
This CVE is not in the KEV list.
Exploit prediction score: < 1% (0.333% probability within 30 days)
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| First Time appeared |
Arcadeai
Arcadeai arcade-mcp |
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| Vendors & Products |
Arcadeai
Arcadeai arcade-mcp |
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| Metrics |
ssvc
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| 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. | |
| Title | Arcade MCP Default Hardcoded Worker Secret Allows Full Unauthorized Access to All HTTP MCP Worker Endpoints | |
| Weaknesses | CWE-321 CWE-798 |
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| References |
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| Metrics |
cvssV3_1
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