Vulnerability Details CVE-2026-25228
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.
Exploit prediction scoring system (EPSS) score
EPSS Score 0.0
EPSS Ranking 1.7%
CVSS Severity
CVSS v3 Score 5.0
References
Products affected by CVE-2026-25228
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cpe:2.3:a:signalk:signal_k_server:0.1.1
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cpe:2.3:a:signalk:signal_k_server:0.1.10
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cpe:2.3:a:signalk:signal_k_server:0.1.11
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cpe:2.3:a:signalk:signal_k_server:0.1.12
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cpe:2.3:a:signalk:signal_k_server:0.1.13
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cpe:2.3:a:signalk:signal_k_server:0.1.18
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cpe:2.3:a:signalk:signal_k_server:0.1.19
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cpe:2.3:a:signalk:signal_k_server:0.1.2
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cpe:2.3:a:signalk:signal_k_server:0.1.24
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cpe:2.3:a:signalk:signal_k_server:0.1.26
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cpe:2.3:a:signalk:signal_k_server:0.1.27
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cpe:2.3:a:signalk:signal_k_server:0.1.28
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cpe:2.3:a:signalk:signal_k_server:0.1.29
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cpe:2.3:a:signalk:signal_k_server:0.1.3
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cpe:2.3:a:signalk:signal_k_server:0.1.30
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cpe:2.3:a:signalk:signal_k_server:0.1.31
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cpe:2.3:a:signalk:signal_k_server:0.1.32
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cpe:2.3:a:signalk:signal_k_server:0.1.33
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cpe:2.3:a:signalk:signal_k_server:0.1.4
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cpe:2.3:a:signalk:signal_k_server:0.1.5
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cpe:2.3:a:signalk:signal_k_server:0.1.6
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cpe:2.3:a:signalk:signal_k_server:0.1.7
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cpe:2.3:a:signalk:signal_k_server:0.1.8
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cpe:2.3:a:signalk:signal_k_server:0.1.9
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cpe:2.3:a:signalk:signal_k_server:1.0.0
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cpe:2.3:a:signalk:signal_k_server:1.0.0-0
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cpe:2.3:a:signalk:signal_k_server:1.0.0-1
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cpe:2.3:a:signalk:signal_k_server:1.0.0-2
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cpe:2.3:a:signalk:signal_k_server:1.0.0-3
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cpe:2.3:a:signalk:signal_k_server:1.0.0-4
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cpe:2.3:a:signalk:signal_k_server:1.1.0
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cpe:2.3:a:signalk:signal_k_server:1.1.1
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cpe:2.3:a:signalk:signal_k_server:1.1.2
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cpe:2.3:a:signalk:signal_k_server:1.10.0
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cpe:2.3:a:signalk:signal_k_server:1.10.1
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cpe:2.3:a:signalk:signal_k_server:1.10.2
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cpe:2.3:a:signalk:signal_k_server:1.10.3
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cpe:2.3:a:signalk:signal_k_server:1.11.0
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cpe:2.3:a:signalk:signal_k_server:1.12.0
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cpe:2.3:a:signalk:signal_k_server:1.13.0
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cpe:2.3:a:signalk:signal_k_server:1.13.1
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cpe:2.3:a:signalk:signal_k_server:1.14.0
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cpe:2.3:a:signalk:signal_k_server:1.15.0
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cpe:2.3:a:signalk:signal_k_server:1.16.0
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cpe:2.3:a:signalk:signal_k_server:1.17.0
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cpe:2.3:a:signalk:signal_k_server:1.18.0
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cpe:2.3:a:signalk:signal_k_server:1.18.1-0
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cpe:2.3:a:signalk:signal_k_server:1.19.0
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cpe:2.3:a:signalk:signal_k_server:1.2.0
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cpe:2.3:a:signalk:signal_k_server:1.2.1
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cpe:2.3:a:signalk:signal_k_server:1.2.2
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cpe:2.3:a:signalk:signal_k_server:1.2.3
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cpe:2.3:a:signalk:signal_k_server:1.2.4
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cpe:2.3:a:signalk:signal_k_server:1.20.0
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cpe:2.3:a:signalk:signal_k_server:1.21.0
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cpe:2.3:a:signalk:signal_k_server:1.22.0
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cpe:2.3:a:signalk:signal_k_server:1.23.0
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cpe:2.3:a:signalk:signal_k_server:1.24.0
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cpe:2.3:a:signalk:signal_k_server:1.25.0
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cpe:2.3:a:signalk:signal_k_server:1.26.0
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cpe:2.3:a:signalk:signal_k_server:1.27.0
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cpe:2.3:a:signalk:signal_k_server:1.27.1
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cpe:2.3:a:signalk:signal_k_server:1.28.0
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cpe:2.3:a:signalk:signal_k_server:1.29.0
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cpe:2.3:a:signalk:signal_k_server:1.3.0
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cpe:2.3:a:signalk:signal_k_server:1.30.0
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cpe:2.3:a:signalk:signal_k_server:1.31.0
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cpe:2.3:a:signalk:signal_k_server:1.32.0
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cpe:2.3:a:signalk:signal_k_server:1.33.0
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cpe:2.3:a:signalk:signal_k_server:1.34.0
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cpe:2.3:a:signalk:signal_k_server:1.35.0
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cpe:2.3:a:signalk:signal_k_server:1.35.1
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cpe:2.3:a:signalk:signal_k_server:1.35.2
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cpe:2.3:a:signalk:signal_k_server:1.36.0
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cpe:2.3:a:signalk:signal_k_server:1.37.0
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cpe:2.3:a:signalk:signal_k_server:1.37.1
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cpe:2.3:a:signalk:signal_k_server:1.37.2
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cpe:2.3:a:signalk:signal_k_server:1.37.3
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cpe:2.3:a:signalk:signal_k_server:1.37.4
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cpe:2.3:a:signalk:signal_k_server:1.37.5
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cpe:2.3:a:signalk:signal_k_server:1.37.6
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cpe:2.3:a:signalk:signal_k_server:1.38.0
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cpe:2.3:a:signalk:signal_k_server:1.38.1
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cpe:2.3:a:signalk:signal_k_server:1.39.0
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cpe:2.3:a:signalk:signal_k_server:1.4.0
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cpe:2.3:a:signalk:signal_k_server:1.4.1
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cpe:2.3:a:signalk:signal_k_server:1.4.2
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cpe:2.3:a:signalk:signal_k_server:1.4.3
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cpe:2.3:a:signalk:signal_k_server:1.40.0
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cpe:2.3:a:signalk:signal_k_server:1.41.0
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cpe:2.3:a:signalk:signal_k_server:1.41.1
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cpe:2.3:a:signalk:signal_k_server:1.41.2
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cpe:2.3:a:signalk:signal_k_server:1.41.3
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cpe:2.3:a:signalk:signal_k_server:1.42.0
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cpe:2.3:a:signalk:signal_k_server:1.43.0
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cpe:2.3:a:signalk:signal_k_server:1.44.0
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cpe:2.3:a:signalk:signal_k_server:1.45.0
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cpe:2.3:a:signalk:signal_k_server:1.46.0
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cpe:2.3:a:signalk:signal_k_server:1.46.1
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cpe:2.3:a:signalk:signal_k_server:1.46.2
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cpe:2.3:a:signalk:signal_k_server:1.46.3
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cpe:2.3:a:signalk:signal_k_server:1.5.0
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cpe:2.3:a:signalk:signal_k_server:1.6.0
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cpe:2.3:a:signalk:signal_k_server:1.7.0
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cpe:2.3:a:signalk:signal_k_server:1.7.1
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cpe:2.3:a:signalk:signal_k_server:1.8.0
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cpe:2.3:a:signalk:signal_k_server:1.9.0
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cpe:2.3:a:signalk:signal_k_server:1.9.1
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cpe:2.3:a:signalk:signal_k_server:2.0.0
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cpe:2.3:a:signalk:signal_k_server:2.1.0
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cpe:2.3:a:signalk:signal_k_server:2.1.1
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cpe:2.3:a:signalk:signal_k_server:2.10.0
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cpe:2.3:a:signalk:signal_k_server:2.11.0
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cpe:2.3:a:signalk:signal_k_server:2.12.0
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cpe:2.3:a:signalk:signal_k_server:2.13.0
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cpe:2.3:a:signalk:signal_k_server:2.13.1
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cpe:2.3:a:signalk:signal_k_server:2.13.2
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cpe:2.3:a:signalk:signal_k_server:2.13.3
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cpe:2.3:a:signalk:signal_k_server:2.13.4
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cpe:2.3:a:signalk:signal_k_server:2.13.5
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cpe:2.3:a:signalk:signal_k_server:2.14.0
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cpe:2.3:a:signalk:signal_k_server:2.14.1
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cpe:2.3:a:signalk:signal_k_server:2.14.2
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cpe:2.3:a:signalk:signal_k_server:2.14.3
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cpe:2.3:a:signalk:signal_k_server:2.14.4
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cpe:2.3:a:signalk:signal_k_server:2.15.0
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cpe:2.3:a:signalk:signal_k_server:2.15.1
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cpe:2.3:a:signalk:signal_k_server:2.15.2
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cpe:2.3:a:signalk:signal_k_server:2.15.3
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cpe:2.3:a:signalk:signal_k_server:2.16.0
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cpe:2.3:a:signalk:signal_k_server:2.17.0
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cpe:2.3:a:signalk:signal_k_server:2.17.1
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cpe:2.3:a:signalk:signal_k_server:2.17.2
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cpe:2.3:a:signalk:signal_k_server:2.18.0
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cpe:2.3:a:signalk:signal_k_server:2.19.0
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cpe:2.3:a:signalk:signal_k_server:2.2.0
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cpe:2.3:a:signalk:signal_k_server:2.2.1
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cpe:2.3:a:signalk:signal_k_server:2.3.0
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cpe:2.3:a:signalk:signal_k_server:2.3.1
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cpe:2.3:a:signalk:signal_k_server:2.4.0
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cpe:2.3:a:signalk:signal_k_server:2.4.1
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cpe:2.3:a:signalk:signal_k_server:2.5.0
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cpe:2.3:a:signalk:signal_k_server:2.6.0
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cpe:2.3:a:signalk:signal_k_server:2.6.1
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cpe:2.3:a:signalk:signal_k_server:2.6.2
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cpe:2.3:a:signalk:signal_k_server:2.7.0
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cpe:2.3:a:signalk:signal_k_server:2.7.1
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cpe:2.3:a:signalk:signal_k_server:2.7.2
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cpe:2.3:a:signalk:signal_k_server:2.8.0
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cpe:2.3:a:signalk:signal_k_server:2.8.1
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cpe:2.3:a:signalk:signal_k_server:2.8.2
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cpe:2.3:a:signalk:signal_k_server:2.8.3
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cpe:2.3:a:signalk:signal_k_server:2.9.0
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cpe:2.3:o:microsoft:windows:-