CVE-2026-39320
Last modified
CVE-2026-39320 is a high-severity vulnerability rated 7.5/10 on the CVSS scale. 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. EPSS estimates a 0.43% chance of exploitation in the next 30 days.
Description
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.
Metrics
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H
Weakness Enumeration
Affected Software
| Vendor | Product | Versions |
|---|---|---|
| Signalk | Signal K Server | < 2.25.0 |
References
- 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
Timeline
- Published
- Last Modified
- Status
- Analyzed
Frequently Asked Questions
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