Read the docs
TI-2026-18939 Aliases CVE-2026-23515GHSA-p8gp-2w28-mhwg

RCE - Command Injection in Signal K set-system-time plugin

Priority HIGH 76CWE-78Published · Updated

Key facts

Attack vector
Network
Privileges required
Low
User interaction
None
Attack complexity
Low
Impact type
Code execution
Confidentiality · integrity · availability
High · High · High
Fix status
Fixed

Attack profile from CVSS 3.1 · CNA. Fix status from CNA and GitHub. Impact type from CWE-78.

Summary

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.

Why it matters now

Exploitation Proof of concept CISA SSVC · not in CISA KEV
EPSS 0.0452 91st percentileScored 2026-11-07
Public exploit Yes 1 exploit referenceTagged by NVD
Fix Fixed signalk-server (SignalK): 1.5.0@signalk/set-system-time (npm): 1.5.0

SSVC decision points

CISA ADP · SSVC 2.0.3

Exploitation
Poc
Automatable
No
Technical impact
Total

The decision (Track, Attend, Act) also depends on your mission and well-being impact; see CISA's SSVC guide.

Affected products

VendorProductAffected versionsFixed inStatusSource
SignalKsignalk-serverbefore 1.5.01.5.0Patch availableCNA
—@signalk/set-system-time (npm)before 1.5.01.5.0Patch availableGHSA-p8gp-2w28-mhwg
  • signalk-server VendorSignalK Affected before 1.5.0 Fixed in 1.5.0 Patch available CNA
  • @signalk/set-system-time (npm) Vendor— Affected before 1.5.0 Fixed in 1.5.0 Patch available GHSA-p8gp-2w28-mhwg

CPE configurations NVD · 1

CPEVersionsRoleVendor
cpe:2.3:a:signalk:signal_k_server:*:*:*:*:*:*:*:*before 1.5.0VulnerableSignalK
  • cpe:2.3:a:signalk:signal_k_server:*:*:*:*:*:*:*:* Versions before 1.5.0 Vulnerable ·SignalK

Remediation

  • Fix · CNA signalk-server (SignalK) Fixed in 1.5.0
  • Fix · GHSA-p8gp-2w28-mhwg @signalk/set-system-time (npm) Fixed in 1.5.0 Advisory →

Timeline

  1. 2026-10-02 Threatist record created from CVE-2026-23515
  2. 2026-10-03 Alias added: GHSA-p8gp-2w28-mhwg

References

Exploit 1

Patch 1

Advisory 1

Other 1

  • TI-2026-26300 signalk-server: Privilege Escalation by Admin Role Injection via /enableSecurity CVSS 3.1CRITICAL 9.4
  • TI-2025-40835 Signal K Server has Unauthenticated State Pollution leading to Remote Code Execution (RCE) CVSS 3.1CRITICAL 9.7
  • TI-2025-42138 Signal K Server vulnerable to JWT Token Theft via WebSocket Enumeration and Unauthenticated Polling CVSS 3.1CRITICAL 9.1
  • TI-2026-30295 Signal K Server's WebSocket Login Endpoint Lacks Rate Limiting (Credential Brute-Force) CVSS 4.0HIGH 8.7
  • TI-2025-42657 Signal K Server Vulnerable to Access Request Spoofing CVSS 3.1HIGH 8.8
  • TI-2025-42137 Signal K Server Vulnerable to Remote Code Execution via Malicious npm Package CVSS 4.0HIGH 7.3
See all 13 →

Sources

This product uses the NVD API but is not endorsed or certified by the NVD. Sources and licences