CVE-2026-33951

signalk-server: Unauthenticated Source Priorities Manipulation

State: Published
Severity: 6.9 Medium
Published: Apr 2, 2026
Updated: Apr 2, 2026
Reserved: Mar 24, 2026

Description

Signal K Server is a server application that runs on a central hub in a boat. Prior to version 2.24.0-beta.1, the SignalK Server exposes an unauthenticated HTTP endpoint that allows remote attackers to modify navigation data source priorities. This endpoint, accessible via PUT /signalk/v1/api/sourcePriorities, does not enforce authentication or authorization checks and directly assigns user-controlled input to the server configuration. As a result, attackers can influence which GPS, AIS, or other sensor data sources are trusted by the system. The changes are immediately applied and persisted to disk, allowing the manipulation to survive server restarts. This issue has been patched in version 2.24.0-beta.1.

Scores

CVSS	Score	Vector	Source
4.0	6.9 Medium	CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:N/VI:L/VA:N/SC:N/SI:N/SA:N	GitHub_M

Weaknesses

CWE-284 Improper Access Control
CWE-306 Missing Authentication for Critical Function

Affected Products

Product	Versions
signalk-serverSignalK	< 2.24.0-beta.1Affected

References

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