CVE-2026-25228
SignalK Server has Path Traversal leading to information disclosure
MEDIUM 4.3EPSS 0.4%
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.
- Affected
- SignalK · signalk-server
- CVSS v3.1 NVD
- 4.3 MEDIUM
CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:L/I:N/A:N - CVSS v3.1 GITHUB
- 5.0 MEDIUM
CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:C/C:L/I:N/A:N - EPSS
- 0.43% chance of exploitation in the next 30 days, 36th percentile
- Published
- 2026-02-02
- Updated
- 2026-02-04
Proof-of-concept exploits (1)
Security advisories
- SignalK/signalk-server/security/advisories/GHSA-vrhw-v2hw-jffx
- SignalK/signalk-server/commit/9bcf61c8fe2cb8a40998b913a02fb64dff9e86c7