Vulnerability Description
Signal K Server is a server application that runs on a central hub in a boat. Prior to 2.20.3, a path traversal vulnerability in SignalK Server's applicationData API allows authenticated users on Windows systems to read, write, and list arbitrary files and directories on the filesystem. The validateAppId() function blocks forward slashes (/) but not backslashes (\), which are treated as directory separators by path.join() on Windows. This enables attackers to escape the intended applicationData directory. This vulnerability is fixed in 2.20.3.
CVSS Score
MEDIUM
Affected Products
| Vendor | Product | Versions |
|---|---|---|
| Signalk | Signal K Server | < 2.20.3 |
| Microsoft | Windows | - |
Related Weaknesses (CWE)
References
- https://github.com/SignalK/signalk-server/commit/9bcf61c8fe2cb8a40998b913a02fb64Patch
- https://github.com/SignalK/signalk-server/security/advisories/GHSA-vrhw-v2hw-jffExploitVendor AdvisoryMitigation
FAQ
What is CVE-2026-25228?
CVE-2026-25228 is a vulnerability with a CVSS score of 5.0 (MEDIUM). Signal K Server is a server application that runs on a central hub in a boat. Prior to 2.20.3, a path traversal vulnerability in SignalK Server's applicationData API allows authenticated users on Wind...
How severe is CVE-2026-25228?
CVE-2026-25228 has been rated MEDIUM with a CVSS base score of 5.0/10. Review the CVSS metrics above for detailed severity breakdown.
Is there a patch for CVE-2026-25228?
Check the references section above for vendor advisories and patch information. Affected products include: Signalk Signal K Server, Microsoft Windows.