CVE-2026-23515: Signalk Signal K Server

High severity, CVSS 8.8. EPSS: 4.6% chance of exploitation in the next 30 days.

Signal K Server is a server application that runs on a central hub in a boat. Prior to 1.5.0, a command injection vulnerability allows authenticated users with write permissions to execute arbitrary shell commands on the Signal K server when the set-system-time plugin is enabled. Unauthenticated users can also exploit this vulnerability if security is disabled on the Signal K server. This occurs due to unsafe construction of shell commands when processing navigation.datetime values received via WebSocket delta messages. This vulnerability is fixed in 1.5.0.

Affected products

• Signalk Signal K Server: before 1.5.0 (fixed in 1.5.0)

Published 2026-02-02. Last modified 2026-06-17.