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1 January 2026

Vulnerabilities first published on this day (UTC), newest first.

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  • Critical 9.1

    Signal K Server vulnerable to JWT Token Theft via WebSocket Enumeration and Unauthenticated Polling

    Signal K Server is a server application that runs on a central hub in a boat. Versions prior to 2.19.0 expose two features that can be chained together to steal JWT authentication tokens without any prior authentication. The attack combines WebSocket-based re…

  • Critical 9.7
    CVE-2025-66398 Public exploit EPSS 20%

    Signal K Server has Unauthenticated State Pollution leading to Remote Code Execution (RCE)

    Signal K Server is a server application that runs on a central hub in a boat. Prior to version 2.19.0, an unauthenticated attacker can pollute the internal state (`restoreFilePath`) of the server via the `/skServer/validateBackup` endpoint. This allows the at…