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.
Published · last modified .
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.
EPSS exploit prediction
EPSS: 0.004 (37.7th percentile), scored .
Very low probability of exploitation in the next 30 days; routine patching cadence is appropriate. 38th percentile — 37.7% of CVEs in the catalogue have a lower EPSS than this one. How to read EPSS.
EPSS over last 30 days · oldest: 0.005 · newest: 0.004 · change: -0.000
Affected products
- Signalk Signal K Server — versions 2.24.0
- Signalk Signalk-Server — versions < 2.24.0-beta.4
Weakness classification (CWE)
References
- github.com/SignalK/signalk-server/security/advisories/GHSA-x8hc-fqv3-7gwf (Exploit, Vendor Advisory)
- github.com/SignalK/signalk-server/releases/tag/v2.24.0-beta.4 (Product, 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.