Is CVE-2026-39320 actively exploited?

No active exploitation of CVE-2026-39320 has been confirmed so far. Continue monitoring, as exploit status can change.

Can CVE-2026-39320 be exploited remotely?

Yes. CVE-2026-39320 is exploitable remotely over the network (CVSS attack vector: Network).

What is the CVSS score of CVE-2026-39320?

CVE-2026-39320 has a CVSS score of 7.5 (HIGH).

HOME VULNERABILITIESCVE-2026-39320

HIGH

CVE-2026-39320

CWE-400Published: April 21, 2026· Updated: Apr 24, 2026

7.5

CVSS v3.1

EPSS:0.04%probability of exploitation in 30 daysPercentile:12.6th

Official 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.

NVD Source

Technical Analysis

CVE-2026-39320 can be exploited remotely over the network without requiring physical or adjacent access, significantly expanding the attack surface for threat actors.

The vulnerability requires no privileges and no user interaction, making it a prime target for automated exploitation campaigns and worm-like propagation.

A successful exploit results in availability disruption (denial of service), with a CVSS base score of 7.5.