CVE-2026-39320

Signal K Server is a server application that runs on a central hub in a boat. Versions prior to 2.25.0 are vulnerable to an unauthenticated Regular Expression Denial of Service (ReDoS) attack within the WebSocket subscription handling logic. By injecting unescaped regex metacharacters into the `context` parameter of a stream subscription, an attacker can force the server's Node.js event loop into a catastrophic backtracking loop when evaluating long string identifiers (like the server's self UUID). This results in a total Denial of Service (DoS) where the server CPU spikes to 100% and becomes completely unresponsive to further API or socket requests. Version 2.25.0 contains a fix.

• CWE-400
• CWE-1333

• https://github.com/SignalK/signalk-server/commit/215d81eb700d5419c3396a0fbf23f2e246dfac2dPatch
• https://github.com/SignalK/signalk-server/pull/2568Issue Tracking, Patch
• https://github.com/SignalK/signalk-server/releases/tag/v2.25.0Product, Release Notes
• https://github.com/SignalK/signalk-server/security/advisories/GHSA-7gcj-phff-2884Exploit, Vendor Advisory
• https://github.com/SignalK/signalk-server/security/advisories/GHSA-7gcj-phff-2884Exploit, Vendor Advisory

Published

Apr 21, 2026

Last Modified

Jun 17, 2026

Status

Analyzed

• How Strix found a critical auth bypass in etcdStrix autonomously discovered a critical authentication bypass in etcd, later designated CVE-2026-33413.
• Autonomous PentestingAI agents that find and validate exploitable vulnerabilities like this one across your applications.
• PR ReviewsPentest every pull request so vulnerable code is caught before it ships to production.
• AI Penetration TestingHow AI-driven penetration testing continuously covers your attack surface.

• CVE-2026-39315Unhead is a document head and template manager. Prior to 2.1…6.1
• CVE-2026-39316OpenPrinting CUPS is an open source printing system for Linu…6.2
• CVE-2026-39317Rejected reason: ** REJECT ** DO NOT USE THIS CANDIDATE NUMB…
• CVE-2026-39318ChurchCRM is an open-source church management system. Versio…8.8
• CVE-2026-39319ChurchCRM is an open-source church management system. Prior …8.8
• CVE-2026-3932Insufficient policy enforcement in PDF in Google Chrome on A…7.5
• CVE-2026-39321Parse Server is an open source backend that can be deployed …3.7
• CVE-2026-39322PolarLearn is a free and open-source learning program. In 0-…8.8
• CVE-2026-39323Rejected reason: ** REJECT ** DO NOT USE THIS CANDIDATE NUMB…
• CVE-2026-39324Rack::Session is a session management implementation for Rac…9.8
• CVE-2026-39325ChurchCRM is an open-source church management system. Prior …7.2
• CVE-2026-39326ChurchCRM is an open-source church management system. Prior …8.8