CVE-2026-39320— Signal K Server has an Unauthenticated Regular Expression Denial of Service (ReDoS) via WebSocket Subscription Paths
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I. Basic Information for CVE-2026-39320
Vulnerability Information
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Vulnerability Title
Signal K Server has an Unauthenticated Regular Expression Denial of Service (ReDoS) via WebSocket Subscription Paths
Source: NVD (National Vulnerability Database)
Vulnerability 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.
Source: NVD (National Vulnerability Database)
CVSS Information
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H
Source: NVD (National Vulnerability Database)
Vulnerability Type
未加控制的资源消耗(资源穷尽)
Source: NVD (National Vulnerability Database)
Vulnerability Title
Signal K Server 安全漏洞
Source: CNNVD (China National Vulnerability Database)
Vulnerability Description
Signal K Server是Signal K开源的一个船用中央服务器。 Signal K Server 2.25.0之前版本存在安全漏洞，该漏洞源于WebSocket订阅处理逻辑对context参数验证不当，可能导致正则表达式拒绝服务攻击。
Source: CNNVD (China National Vulnerability Database)
CVSS Information
N/A
Source: CNNVD (China National Vulnerability Database)
Vulnerability Type
N/A
Source: CNNVD (China National Vulnerability Database)
Affected Products
| Vendor | Product | Affected Versions | CPE | Subscribe |
|---|---|---|---|---|
| SignalK | signalk-server | < 2.25.0 | - |
II. Public POCs for CVE-2026-39320
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|---|
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IV. Related Vulnerabilities
Same product: signalk-server
- CVE-2026-41893
Signal K Server's WebSocket Login Endpoint Lacks Rate Limiti - CVE-2026-35038
signalk-server: Arbitrary Prototype Read via `from` Field By - CVE-2026-34083
signalk-server: OAuth Authorization Code Theft via Unvalidat - CVE-2026-33951
signalk-server: Unauthenticated Source Priorities Manipulati - CVE-2026-33950
signalk-server: Privilege Escalation by Admin Role Injection
Same vendor: SignalK
- CVE-2026-41893
Signal K Server's WebSocket Login Endpoint Lacks Rate Limiti - CVE-2026-35038
signalk-server: Arbitrary Prototype Read via `from` Field By - CVE-2026-34083
signalk-server: OAuth Authorization Code Theft via Unvalidat - CVE-2026-33951
signalk-server: Unauthenticated Source Priorities Manipulati - CVE-2026-33950
signalk-server: Privilege Escalation by Admin Role Injection
Same weakness: CWE-400
- CVE-2026-8187
Open5GS UPF gtp-path.c _gtpv1_u_recv_cb resource consumption - CVE-2026-42343
FastGPT: Uncontrolled Resource Consumption leading to Sandbo - CVE-2026-42212
SolidCAM-GPPL-IDE: XML External Entity (XXE) and billion-lau - CVE-2026-32686
Unbounded exponent in decimal enables unauthenticated DoS - CVE-2026-20188
Cisco Crosswork Network Controller and Cisco Network Service
V. Comments for CVE-2026-39320
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