CVE-2025-66454

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Source
https://cve.org/CVERecord?id=CVE-2025-66454
Import Source
https://storage.googleapis.com/cve-osv-conversion/osv-output/CVE-2025-66454.json
JSON Data
https://api.osv.dev/v1/vulns/CVE-2025-66454
Aliases
Published
2025-12-02T18:23:33.377Z
Modified
2025-12-06T07:05:29.335479Z
Severity
  • 6.5 (Medium) CVSS_V3 - CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:L/I:L/A:N CVSS Calculator
Summary
Arcade MCP Default Hardcoded Worker Secret Allows Full Unauthorized Access to All HTTP MCP Worker Endpoints
Details

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.

Database specific 
{
    "cna_assigner": "GitHub_M",
    "cwe_ids": [
        "CWE-321",
        "CWE-798"
    ],
    "osv_generated_from": "https://github.com/CVEProject/cvelistV5/tree/main/cves/2025/66xxx/CVE-2025-66454.json"
}
References

Affected packages

Git / github.com/arcadeai/arcade-mcp

Affected ranges

Type
GIT
Repo
https://github.com/arcadeai/arcade-mcp
Events
Introduced
0 Unknown introduced commit / All previous commits are affected
Fixed
44660d18ceb220600401303df860a31ca766c817

Affected versions

0.*
0.0.10
0.0.11
0.0.12
0.0.13
0.0.14
0.0.15
0.0.6
0.0.7
0.0.8
0.0.8.dev0
0.0.8.dev1
0.0.9
0.1.0
0.1.1
0.1.2
0.1.3
0.1.4
0.1.5
0.1.6
1.*
1.0.0
1.0.1
1.0.2
1.0.3
1.0.4
1.0.5
1.1.0
1.1.1
1.1.2
1.1.3
1.1.4
1.1.5
1.1.6
1.1.7
1.1.8
1.1.9
1.2.0
1.3.0
1.3.1
1.3.2
1.3.3
1.3.4
1.3.5
1.4.0
1.4.1
1.4.2
1.4.3
1.4.4
1.4.5
1.4.6
1.4.7
1.4.8
v0.*
v0.0.1
v0.0.2
v0.0.3
v0.0.4
v0.0.5
v0.0.6
v1.*
v1.4.9
v2.*
v2.0.0
v2.0.1
v2.0.2
v2.0.3
v2.0.4
v2.0.5
v2.0.6
v2.0.7
v2.0.8
v2.0.9

Database specific

source 
"https://storage.googleapis.com/cve-osv-conversion/osv-output/CVE-2025-66454.json"