Medium 5.0Published Feb 2, 2026

CVE-2026-25228SignalK Server has Path Traversal leading to information disclosure

Updated under an hour ago (Oct 27, 2026, 8:30 PM ET)

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Every CVE for signalk-server

Exploited in the last 30 days

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: 5.0 MEDIUM (v3.1, CNA)CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:C/C:L/I:N/A:N
Weakness (CWE): CWE-22
Known exploited: Not in CISA's KEV catalog
EPSS (exploitation in the next 30 days): Not loaded for this CVE
Assigned by: GitHub_M
NVD analysis: Analyzed
Record last updated: Feb 4, 2026
First seen by InfoSec Signals: Oct 9, 2026

Affected products

Affected products

SignalK signalk-server signalk:server (from the name)	before 2.20.3	CNA record
signalk signal_k_server signalk:signal_k_server	before 2.20.3	NVD

References

References

https://github.com/SignalK/signalk-server/security/advisories/GHSA-vrhw-v2hw-jffx	x-refsource-confirm, exploit, mitigation, vendor-advisory
https://github.com/SignalK/signalk-server/commit/9bcf61c8fe2cb8a40998b913a02fb64dff9e86c7	x-refsource-misc, patch

The CVE record on cve.org NVD's entry

The CVE record is authoritative. Products marked “from the name” were identified from the CNA's free-text names, not a CPE, and are matched less certainly. This product uses the NVD API but is not endorsed or certified by the NVD.