CVE-2026-33951
signalk-server: Unauthenticated Source Priorities Manipulation
Description
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 SignalK Server exposes an unauthenticated HTTP endpoint that allows remote attackers to modify navigation data source priorities. This endpoint, accessible via PUT /signalk/v1/api/sourcePriorities, does not enforce authentication or authorization checks and directly assigns user-controlled input to the server configuration. As a result, attackers can influence which GPS, AIS, or other sensor data sources are trusted by the system. The changes are immediately applied and persisted to disk, allowing the manipulation to survive server restarts. This issue has been patched in version 2.24.0-beta.1.
INFO
Published Date :
April 2, 2026, 5:16 p.m.
Last Modified :
July 24, 2026, 9:10 p.m.
Remotely Exploit :
Yes !
Source :
[email protected]
CVSS Scores
| Score | Version | Severity | Vector | Exploitability Score | Impact Score | Source |
|---|---|---|---|---|---|---|
| CVSS | 134c704f-9b21-4f2e-91b3-4a467353bcc0 | |||||
| CVSS 3.1 | HIGH | [email protected] | ||||
| CVSS 4.0 | MEDIUM | [email protected] |
Solution
- Update Signal K Server to version 2.24.0-beta.1.
- Apply patches for subsequent versions.
References to Advisories, Solutions, and Tools
Here, you will find a curated list of external links that provide in-depth
information, practical solutions, and valuable tools related to
CVE-2026-33951.
| URL | Resource |
|---|---|
| https://github.com/SignalK/signalk-server/releases/tag/v2.24.0-beta.1 | Product Release Notes |
| https://github.com/SignalK/signalk-server/security/advisories/GHSA-gfmv-vh34-h2x5 | Vendor Advisory |
CWE - Common Weakness Enumeration
While CVE identifies
specific instances of vulnerabilities, CWE categorizes the common flaws or
weaknesses that can lead to vulnerabilities. CVE-2026-33951 is
associated with the following CWEs:
Common Attack Pattern Enumeration and Classification (CAPEC)
Common Attack Pattern Enumeration and Classification
(CAPEC)
stores attack patterns, which are descriptions of the common attributes and
approaches employed by adversaries to exploit the CVE-2026-33951
weaknesses.
We scan GitHub repositories to detect new proof-of-concept exploits. Following list is a collection of public exploits and proof-of-concepts, which have been published on GitHub (sorted by the most recently updated).
Results are limited to the first 15 repositories due to potential performance issues.
The following list is the news that have been mention
CVE-2026-33951 vulnerability anywhere in the article.
The following table lists the changes that have been made to the
CVE-2026-33951 vulnerability over time.
Vulnerability history details can be useful for understanding the evolution of a vulnerability, and for identifying the most recent changes that may impact the vulnerability's severity, exploitability, or other characteristics.
-
CVE Translated by [email protected]
Jul. 24, 2026
Action Type Old Value New Value Added Translation Title: signalk-server de SignalK, Description: Signal K Server es una aplicación de servidor que se ejecuta en un concentrador central en un barco. Antes de la versión 2.24.0-beta.1, el SignalK Server expone un endpoint HTTP no autenticado que permite a atacantes remotos modificar las prioridades de las fuentes de datos de navegación. Este endpoint, accesible a través de PUT /signalk/v1/api/sourcePriorities, no aplica comprobaciones de autenticación ni autorización y asigna directamente la entrada controlada por el usuario a la configuración del servidor. Como resultado, los atacantes pueden influir en qué fuentes de datos de GPS, AIS u otros sensores son confiables para el sistema. Los cambios se aplican inmediatamente y se persisten en el disco, permitiendo que la manipulación sobreviva a los reinicios del servidor. Este problema ha sido parcheado en la versión 2.24.0-beta.1. -
CVE Modified by [email protected]
Jun. 17, 2026
Action Type Old Value New Value Added Affected [{'vendor': 'SignalK', 'product': 'signalk-server', 'versions': [{'status': 'affected', 'version': '< 2.24.0-beta.1'}]}] -
CVE Modified by 134c704f-9b21-4f2e-91b3-4a467353bcc0
Jun. 17, 2026
Action Type Old Value New Value Added SSVC {'id': 'CVE-2026-33951', 'role': 'CISA Coordinator', 'options': [{'exploitation': 'none'}, {'automatable': 'yes'}, {'technicalImpact': 'partial'}], 'version': '2.0.3', 'timestamp': '2026-04-02T16:21:02.812192Z'} -
Initial Analysis by [email protected]
Apr. 06, 2026
Action Type Old Value New Value Added CVSS V3.1 AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:H/A:N Added CPE Configuration OR *cpe:2.3:a:signalk:signal_k_server:*:*:*:*:*:*:*:* versions up to (excluding) 2.24.0 Added Reference Type GitHub, Inc.: https://github.com/SignalK/signalk-server/releases/tag/v2.24.0-beta.1 Types: Product, Release Notes Added Reference Type GitHub, Inc.: https://github.com/SignalK/signalk-server/security/advisories/GHSA-gfmv-vh34-h2x5 Types: Vendor Advisory -
New CVE Received by [email protected]
Apr. 02, 2026
Action Type Old Value New Value Added Description 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 SignalK Server exposes an unauthenticated HTTP endpoint that allows remote attackers to modify navigation data source priorities. This endpoint, accessible via PUT /signalk/v1/api/sourcePriorities, does not enforce authentication or authorization checks and directly assigns user-controlled input to the server configuration. As a result, attackers can influence which GPS, AIS, or other sensor data sources are trusted by the system. The changes are immediately applied and persisted to disk, allowing the manipulation to survive server restarts. This issue has been patched in version 2.24.0-beta.1. Added CVSS V4.0 AV:N/AC:L/AT:N/PR:N/UI:N/VC:N/VI:L/VA:N/SC:N/SI:N/SA:N/E:X/CR:X/IR:X/AR:X/MAV:X/MAC:X/MAT:X/MPR:X/MUI:X/MVC:X/MVI:X/MVA:X/MSC:X/MSI:X/MSA:X/S:X/AU:X/R:X/V:X/RE:X/U:X Added CWE CWE-284 Added CWE CWE-306 Added Reference https://github.com/SignalK/signalk-server/releases/tag/v2.24.0-beta.1 Added Reference https://github.com/SignalK/signalk-server/security/advisories/GHSA-gfmv-vh34-h2x5