CVE-2026-33950 signalk-server: Privilege Escalation by Admin Role Injection via /enableSecurity

What is CVE-2026-33950?

CVE-2026-33950 is a critical vulnerability in signalk-server, published on 2 Apr 2026. An attacker can exploit it over the internet without logging in, with no action from the victim.

Official description

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.

Weakness: CWE-862, CWE-288, CWE-285

Which versions are affected by CVE-2026-33950?

2 open source packages ship an affected version, including signalk-server. It affects 1 product.

Products include Signalk Signal K Server.

How do I fix CVE-2026-33950?

Upgrade signalk-server to 2.24.0-beta.4 or later.

Is CVE-2026-33950 being exploited?

It is not confirmed as exploited in the wild, but public exploit code for CVE-2026-33950 exists.

Other vulnerabilities in signalk-server

• CVE-2026-23515 RCE - Command Injection in Signal K set-system-time plugin Critical 10.0
• CVE-2025-66398 Signal K Server has Unauthenticated State Pollution leading to Remote Code Execution (RCE) Critical 9.7
• CVE-2025-68620 Signal K Server vulnerable to JWT Token Theft via WebSocket Enumeration and Unauthenticated Polling Critical 9.1
• CVE-2026-41893 Signal K Server's WebSocket Login Endpoint Lacks Rate Limiting (Credential Brute-Force) High 8.7
• CVE-2026-39320 Signal K Server has an Unauthenticated Regular Expression Denial of Service (ReDoS) via WebSocket Subscription Paths High 7.5

Sources

• CVE record
• NVD
• OSV
• GitHub advisory
• How this page is made

Also known as GHSA-x8hc-fqv3-7gwf.