Auth bypass in Signalk Signal K Server
CVE-2026-33950
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.
EPSS: 0.004 (35.3th percentile) — read the EPSS interpretation.
CVSS v3 metric
CVSS v3 base score 9.4 (Critical). Vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:L.
Affected products
- Signalk Signal_k_server — versions 2.24.0
- Signalk Signalk-server — versions < 2.24.0-beta.4
Weakness classification (CWE)
References
- security-advisories@github.com (x_refsource_CONFIRM, Exploit, Vendor Advisory)
- security-advisories@github.com (Product, x_refsource_MISC, Release Notes)
Frequently asked questions
- What is CVE-2026-33950?
- CVE-2026-33950 is a critical-severity vulnerability in Signalk Signal K Server, classified under Improper Authorization. CVSS score: 9.4/10. Published 2026-04-02.
- How severe is CVE-2026-33950?
- Critical severity. CVSS v3 base score is 9.4 out of 10.