CVE-2026-23515

Critical

Description

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.

SeverityCritical
CVSS9.9
Exploit probability—
ProductSignalk Signal K Server
PublishedFeb 2, 2026
First seenFeb 2, 2026

How to fix

Update
  • signalk signal_k_server1.5.0 or later
  • @signalk/set-system-time1.5.0 or later

Affected products

ProductAffected versionsFixed in
signalk signal_k_serverv < 1.5.01.5.0
@signalk/set-system-timenpmv < 1.5.01.5.0

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