What’s Vulnerable › Vulnerabilities

CVE-2026-23515: RCE - Command Injection in Signal K set-system-time plugin

• Severity: high (CVSS 8.8 v3.1)
• Exploited in the wild: not listed in CISA KEV
• EPSS: 4.6% probability of exploitation in the next 30 days
• Public exploit or detection template: yes
• Published: 2026-02-02 · updated 2026-06-17
• Weakness: CWE-78

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.

Affected products

• signalk-server: before 1.5.0 — fixed in 1.5.0

How to fix

Upgrade to a fixed version: signalk-server 1.5.0. Check the vendor advisory for mitigations.

References

• https://github.com/SignalK/set-system-time/commit/75b11eae2de528bf89ede3fb1f7ed057ddbb4d24
• https://github.com/SignalK/signalk-server/security/advisories/GHSA-p8gp-2w28-mhwg

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