CVE-2026-33951: CWE-284: Improper Access Control in SignalK signalk-server
SignalK Server versions prior to 2. 24. 0-beta. 1 have an unauthenticated HTTP endpoint that allows remote attackers to modify navigation data source priorities without authentication or authorization. This vulnerability enables attackers to control which GPS, AIS, or sensor data sources the system trusts. Changes made via this endpoint are applied immediately and persist across server restarts. The issue has been patched in version 2. 24. 0-beta. 1.
AI Analysis
Technical Summary
CVE-2026-33951 is an improper access control vulnerability (CWE-284) in the SignalK Server application before version 2.24.0-beta.1. The server exposes an unauthenticated PUT endpoint (/signalk/v1/api/sourcePriorities) that accepts user input to modify navigation data source priorities. Because there are no authentication or authorization checks, remote attackers can manipulate which sensor data sources are trusted by the system. These changes are applied immediately and saved to disk, persisting through restarts. This vulnerability has been addressed in version 2.24.0-beta.1.
Potential Impact
An attacker can remotely modify the configuration of navigation data source priorities without any authentication, potentially causing the system to trust malicious or incorrect GPS, AIS, or other sensor data. This could lead to incorrect navigation information being used by the system. The changes persist after server restarts, increasing the impact duration. The CVSS 4.0 base score is 6.9 (medium severity). There are no known exploits in the wild at this time.
Mitigation Recommendations
Upgrade to SignalK Server version 2.24.0-beta.1 or later, where this vulnerability has been patched. Prior to upgrading, restrict network access to the server to trusted users only to reduce exposure. Patch status is confirmed fixed in the specified version.
CVE-2026-33951: CWE-284: Improper Access Control in SignalK signalk-server
Description
SignalK Server versions prior to 2. 24. 0-beta. 1 have an unauthenticated HTTP endpoint that allows remote attackers to modify navigation data source priorities without authentication or authorization. This vulnerability enables attackers to control which GPS, AIS, or sensor data sources the system trusts. Changes made via this endpoint are applied immediately and persist across server restarts. The issue has been patched in version 2. 24. 0-beta. 1.
AI-Powered Analysis
Machine-generated threat intelligence
Technical Analysis
CVE-2026-33951 is an improper access control vulnerability (CWE-284) in the SignalK Server application before version 2.24.0-beta.1. The server exposes an unauthenticated PUT endpoint (/signalk/v1/api/sourcePriorities) that accepts user input to modify navigation data source priorities. Because there are no authentication or authorization checks, remote attackers can manipulate which sensor data sources are trusted by the system. These changes are applied immediately and saved to disk, persisting through restarts. This vulnerability has been addressed in version 2.24.0-beta.1.
Potential Impact
An attacker can remotely modify the configuration of navigation data source priorities without any authentication, potentially causing the system to trust malicious or incorrect GPS, AIS, or other sensor data. This could lead to incorrect navigation information being used by the system. The changes persist after server restarts, increasing the impact duration. The CVSS 4.0 base score is 6.9 (medium severity). There are no known exploits in the wild at this time.
Mitigation Recommendations
Upgrade to SignalK Server version 2.24.0-beta.1 or later, where this vulnerability has been patched. Prior to upgrading, restrict network access to the server to trusted users only to reduce exposure. Patch status is confirmed fixed in the specified version.
Technical Details
- Data Version
- 5.2
- Assigner Short Name
- GitHub_M
- Date Reserved
- 2026-03-24T19:50:52.106Z
- Cvss Version
- 4.0
- State
- PUBLISHED
Threat ID: 69ce9803e6bfc5ba1dea5acd
Added to database: 4/2/2026, 4:23:31 PM
Last enriched: 4/10/2026, 12:01:22 AM
Last updated: 5/20/2026, 9:37:51 PM
Views: 54
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