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

February 2, 2026 (updated February 3, 2026)

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.

References

github.com/SignalK/set-system-time/commit/75b11eae2de528bf89ede3fb1f7ed057ddbb4d24
github.com/SignalK/signalk-server
github.com/SignalK/signalk-server/security/advisories/GHSA-p8gp-2w28-mhwg
github.com/advisories/GHSA-p8gp-2w28-mhwg
nvd.nist.gov/vuln/detail/CVE-2026-23515

Code Behaviors & Features

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