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

published 2026-04-02 7 mo ago modified 2026-07-24 3 mo ago also GHSA-x8hc-fqv3-7gwf , EUVD-2026-18372

cvss: 9.4; version 3.1, CNA
cisa kev: Not listed; not in CISA's catalog
epss: 0.4%; EPSS 0.4% chance of exploitation in 30 days, percentile 37%
public exploits: 0; none known

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.

Patch / fix

fixed in 2 links 1

npm signalk-server 2.24.0-beta.4
signalk signal_k_server 2.24.0

github.com/SignalK/signalk-server/releases/tag/v2.24.0-beta.4 release

CISA SSVC

Exploitation: Proof of concept is public
Automatable: yes
Technical impact: total
Assessed: 7 mo ago (2026-04-03)

Exploit prediction

0.43% chance of exploitation in the next 30 days, higher than 37% of all scored CVEs (FIRST EPSS, 2026-11-08).

Exploits and checks

github.com https://github.com/SignalK/signalk-server/security/advisories/GHSA-x8hc-fqv3-7gwf referenced PoC, tagged "exploit" by a source, unverified

CVSS scores

assigned by	version	score	vector
CNA	3.1	9.4	CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:L
GitHub	3.1	9.4	CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:L

Affected packages

ecosystem	package	affected	fixed in
npm	signalk-server	<2.24.0-beta.4	2.24.0-beta.4

Affected products

SignalK signalk-server

Classification

Weakness

CWE-285 Improper Authorization
CWE-288 Authentication Bypass Using an Alternate Path or Channel
CWE-862 Missing Authorization

References

github.com /SignalK/signalk-server/security/advisories/GHSA-x8hc-fqv3-7gwf
web, exploit, vendor-advisory
github.com /SignalK/signalk-server/releases/tag/v2.24.0-beta.4
web, product, release-notes
nvd.nist.gov /vuln/detail/CVE-2026-33950
advisory
github.com /SignalK/signalk-server
package

Sources

Fencer Vulns keeps one entry per vulnerability: the CVE id wins, then GHSA, and records that alias each other are merged, except that two CVEs always keep separate entries. The same data is available as JSON.

Summary