PT-2026-29797 · Signal · Signal K Server

Published 2026-04-02 · Updated 2026-04-02 · CVE-2026-33951

NVD

CVSS v4.0

6.9

Medium

AV:N/AC:L/AT:N/PR:N/UI:N/VC:N/VI:L/VA:N/SC:N/SI:N/SA:N/E:X/CR:X/IR:X/AR:X/MAV:X/MAC:X/MAT:X/MPR:X/MUI:X/MVC:X/MVI:X/MVA:X/MSC:X/MSI:X/MSA:X/S:X/AU:X/R:X/V:X/RE:X/U:X

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.

Fix

Missing Authentication

Improper Access Control

Weakness Enumeration

CWE-306

CWE-284

Related Identifiers

CVE-2026-33951

Affected Products

Signal K Server

References · 3

• https://nvd.nist.gov/vuln/detail/CVE-2026-33951 · Security Note
• https://github.com/SignalK/signalk-server/security/advisories/GHSA-gfmv-vh34-h2x5 · Note
• https://github.com/SignalK/signalk-server/releases/tag/v2.24.0-beta.1 · Note