How severe is CVE-2026-33950?

CVE-2026-33950 has a CVSS 3.x base score of 9.4, rated critical severity. It is exploitable over network with low attack complexity, requires no privileges and no user interaction. Impact on confidentiality is high, integrity high, and availability low.

Is CVE-2026-33950 being actively exploited?

It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 0% (34th percentile), an estimate of the probability of exploitation in the next 30 days.

What products are affected by CVE-2026-33950?

CVE-2026-33950 primarily affects Signalk Signal K Server. In total, 4 product configurations (CPEs) are listed as vulnerable; see the affected-products list for the exact versions.

How do I fix CVE-2026-33950?

Review the linked vendor and NVD advisories for patched versions and mitigations, then upgrade or apply the recommended workaround. Given its critical severity, prioritise patching exposed systems.

Does CVE-2026-33950 have an EU (EUVD) identifier?

Yes. CVE-2026-33950 is tracked in the ENISA EU Vulnerability Database (EUVD) as EUVD-2026-18372.

When was CVE-2026-33950 published?

CVE-2026-33950 was published on 2026-04-02 and last updated on 2026-06-17.

CVE-2026-33950

CVE-2026-33950 is a critical-severity vulnerability in Signalk Signal K Server with a CVSS 3.x base score of 9.4. It is not currently listed as actively exploited by CISA, and its EPSS exploit-prediction score is low. The underlying weakness is classified as CWE-285.

Key facts

Severity: Critical (CVSS 3.x base score 9.4)
EPSS exploit prediction: 0% (34th percentile)
Actively exploited: Not listed in CISA KEV
EU (EUVD) id: EUVD-2026-18372
Weakness: CWE-285
Affected product: Signalk Signal K Server
Published: 2026-04-02
Last modified: 2026-06-17

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.

Frequently asked questions

What is 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.
How severe is CVE-2026-33950?: CVE-2026-33950 has a CVSS 3.x base score of 9.4, rated critical severity. It is exploitable over network with low attack complexity, requires no privileges and no user interaction. Impact on confidentiality is high, integrity high, and availability low.
Is CVE-2026-33950 being actively exploited?: It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 0% (34th percentile), an estimate of the probability of exploitation in the next 30 days.
What products are affected by CVE-2026-33950?: CVE-2026-33950 primarily affects Signalk Signal K Server. In total, 4 product configurations (CPEs) are listed as vulnerable; see the affected-products list for the exact versions.
How do I fix CVE-2026-33950?: Review the linked vendor and NVD advisories for patched versions and mitigations, then upgrade or apply the recommended workaround. Given its critical severity, prioritise patching exposed systems.
Does CVE-2026-33950 have an EU (EUVD) identifier?: Yes. CVE-2026-33950 is tracked in the ENISA EU Vulnerability Database (EUVD) as EUVD-2026-18372.
When was CVE-2026-33950 published?: CVE-2026-33950 was published on 2026-04-02 and last updated on 2026-06-17.

References

Affected products (4)

cpe:2.3:a:signalk:signal_k_server:*:*:*:*:*:*:*:*
cpe:2.3:a:signalk:signal_k_server:2.24.0:beta1:*:*:*:*:*:*
cpe:2.3:a:signalk:signal_k_server:2.24.0:beta2:*:*:*:*:*:*
cpe:2.3:a:signalk:signal_k_server:2.24.0:beta3:*:*:*:*:*:*

More vulnerabilities in Signalk Signal K Server

CVE-2026-23515 — Critical (CVSS 9.9): Signal K Server is a server application that runs on a central hub in a boat. Prior to 1.5.0, a command injection…
CVE-2025-66398 — Critical (CVSS 9.6): Signal K Server is a server application that runs on a central hub in a boat. Prior to version 2.19.0, an…
CVE-2025-68620 — Critical (CVSS 9.1): Signal K Server is a server application that runs on a central hub in a boat. Versions prior to 2.19.0 expose two…
CVE-2026-41893 — High (CVSS 7.5): Signal K Server is a server application that runs on a central hub in a boat. Prior to version 2.25.0, the HTTP login…
CVE-2026-39320 — High (CVSS 7.5): Signal K Server is a server application that runs on a central hub in a boat. Versions prior to 2.25.0 are vulnerable…
CVE-2026-33951 — High (CVSS 7.5): Signal K Server is a server application that runs on a central hub in a boat. Prior to version 2.24.0-beta.1, the…

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