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TI-2026-26300 Aliases CVE-2026-33950GHSA-x8hc-fqv3-7gwf

signalk-server: Privilege Escalation by Admin Role Injection via /enableSecurity

Priority HIGH 82CWE-285Published · Updated

Key facts

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

Attack profile from CVSS 3.1 · CNA. Fix status from CNA and GitHub. Impact type from CWE-285.

Summary

Signal K Server is a server application that runs on a central hub in a boat. Prior to version 2.24.0-beta.4, there is a privilege escalation vulnerability by Admin Role Injection via /enableSecurity. An unauthenticated attacker can gain full Administrator access to the SignalK server at any time, allowing them to modify sensitive vessel routing data, alter server configurations, and access restricted endpoints. This issue has been patched in version 2.24.0-beta.4.

Why it matters now

Exploitation Proof of concept CISA SSVC · not in CISA KEV
EPSS 0.00434 37th percentileScored 2026-11-07
Public exploit Yes 1 exploit referenceTagged by NVD
Fix Fixed signalk-server (SignalK): 2.24.0-beta.4signalk-server (npm): 2.24.0-beta.4

SSVC decision points

CISA ADP · SSVC 2.0.3

Exploitation
Poc
Automatable
Yes
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 2.24.0-beta.42.24.0-beta.4Patch availableCNA
—signalk-server (npm)before 2.24.0-beta.42.24.0-beta.4Patch availableGHSA-x8hc-fqv3-7gwf
  • signalk-server VendorSignalK Affected before 2.24.0-beta.4 Fixed in 2.24.0-beta.4 Patch available CNA
  • signalk-server (npm) Vendor— Affected before 2.24.0-beta.4 Fixed in 2.24.0-beta.4 Patch available GHSA-x8hc-fqv3-7gwf

CPE configurations NVD · 4

CPEVersionsRoleVendor
cpe:2.3:a:signalk:signal_k_server:*:*:*:*:*:*:*:*before 2.24.0VulnerableSignalK
cpe:2.3:a:signalk:signal_k_server:2.24.0:beta1:*:*:*:*:*:*2.24.0 beta1VulnerableSignalK
cpe:2.3:a:signalk:signal_k_server:2.24.0:beta2:*:*:*:*:*:*2.24.0 beta2VulnerableSignalK
cpe:2.3:a:signalk:signal_k_server:2.24.0:beta3:*:*:*:*:*:*2.24.0 beta3VulnerableSignalK
  • cpe:2.3:a:signalk:signal_k_server:*:*:*:*:*:*:*:* Versions before 2.24.0 Vulnerable ·SignalK
  • cpe:2.3:a:signalk:signal_k_server:2.24.0:beta1:*:*:*:*:*:* Versions 2.24.0 beta1 Vulnerable ·SignalK
  • cpe:2.3:a:signalk:signal_k_server:2.24.0:beta2:*:*:*:*:*:* Versions 2.24.0 beta2 Vulnerable ·SignalK
  • cpe:2.3:a:signalk:signal_k_server:2.24.0:beta3:*:*:*:*:*:* Versions 2.24.0 beta3 Vulnerable ·SignalK

Remediation

  • Fix · CNA signalk-server (SignalK) Fixed in 2.24.0-beta.4
  • Fix · GHSA-x8hc-fqv3-7gwf signalk-server (npm) Fixed in 2.24.0-beta.4 Advisory →

Timeline

  1. 2026-10-02 Threatist record created from CVE-2026-33950
  2. 2026-10-03 Alias added: GHSA-x8hc-fqv3-7gwf

References

Exploit 1

Advisory 1

Other 2

  • 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-2026-18939 RCE - Command Injection in Signal K set-system-time plugin CVSS 3.1CRITICAL 10.0
  • 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