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arcade-mcp-server Has Default Hardcoded Worker Secret That Allows Full Unauthorized Access to All HTTP MCP Worker Endpoints

🗓️ 07 Jul 2026 16:03:11Reported by Python Packaging AdvisoryType 
pypa
 pypa🔗 github.com👁 2 Views

arcade-mcp uses a hardcoded default worker secret enabling unauthenticated web tokens to access all worker endpoints.

Related
Detection
Refs
ReporterTitlePublishedViews
Family
Circl		CVE-2025-66454
2 Dec 202500:58
–circl
CNNVD		Arcade MCP Server Framework 信任管理问题漏洞
2 Dec 202500:00
–cnnvd
CVE		CVE-2025-66454
2 Dec 202518:23
–cve
Cvelist		CVE-2025-66454 Arcade MCP Default Hardcoded Worker Secret Allows Full Unauthorized Access to All HTTP MCP Worker Endpoints
2 Dec 202518:23
–cvelist
EUVD		EUVD-2025-200280
2 Dec 202517:55
–euvd
Github Security Blog		arcade-mcp-server Has Default Hardcoded Worker Secret That Allows Full Unauthorized Access to All HTTP MCP Worker Endpoints
2 Dec 202517:55
–github
NVD		CVE-2025-66454
2 Dec 202519:15
–nvd
OSV		CVE-2025-66454 Arcade MCP Default Hardcoded Worker Secret Allows Full Unauthorized Access to All HTTP MCP Worker Endpoints
2 Dec 202518:23
–osv
OSV		GHSA-G2JX-37X6-6438 arcade-mcp-server Has Default Hardcoded Worker Secret That Allows Full Unauthorized Access to All HTTP MCP Worker Endpoints
2 Dec 202517:55
–osv
OSV		PYSEC-2026-1192 arcade-mcp-server Has Default Hardcoded Worker Secret That Allows Full Unauthorized Access to All HTTP MCP Worker Endpoints
7 Jul 202616:03
–osv
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Vulners
Node
pypiarcade-mcp-serverRange0–1.9.1

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07 Jul 2026 17:23Current
6.1Medium risk
Vulners AI Score6.1
CVSS 3.16.5
EPSS0.00281
SSVC
hardcoded secretworker authenticationweb token forgeryendpoint accessarcade mcpsecurity vulnerability
2