Path Traversal Vulnerability in Signal K Server by Signal K
CVE-2026-25228

5MEDIUM

Key Information:

Vendor

Signalk

Status
Signalk-server
Vendor
CVE Published:
2 February 2026

What is CVE-2026-25228?

Signal K Server, designed for managing data in marine applications, exhibits a path traversal vulnerability in its applicationData API for versions prior to 2.20.3. This flaw permits authenticated users on Windows systems to exploit the application by reading, writing, and listing arbitrary files and directories beyond the intended applicationData scope. The root cause lies in the validateAppId() method, which inadequately sanitizes input by failing to block backslashes, leading to potential unauthorized file system access. Users are advised to upgrade to version 2.20.3 or later to mitigate this issue.

Affected Version(s)

signalk-server < 2.20.3

References

https://github.com/SignalK/signalk-server/security/adviso...
x_refsource_CONFIRM
https://github.com/SignalK/signalk-server/commit/9bcf61c8...
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CVSS V3.1

Score:
5
Severity:
MEDIUM
Confidentiality:
Low
Integrity:
None
Availability:
Low
Attack Vector:
Network
Attack Complexity:
Low
Privileges Required:
Low
User Interaction:
None
Scope:
Changed

Timeline

  • Vulnerability published

  • Vulnerability Reserved

.