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CVE-2026-33951— signalk-server: Unauthenticated Source Priorities Manipulation

Quick assessment

Affected
SignalK signalk-server
Exploitation
No confirmed in-the-wild exploitation; assess based on exposure
Recommended action
Check the vendor advisory and references for a fixed version. If immediate upgrade is impossible, restrict exposure and increase monitoring.

Signal K Server是Signal K开源的一个船用中央服务器。 Signal K Server 2.24.0-beta.1之前版本存在访问控制错误漏洞，该漏洞源于未经验证的端点允许修改数据源优先级，可能导致导航数据被操纵。

AI Predicted 9.8 Difficulty: Trivial EPSS 0.54% · P44
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I. Basic Information for CVE-2026-33951

Vulnerability Information
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Vulnerability Title
signalk-server: Unauthenticated Source Priorities Manipulation
Source: CVE Program / CVE List V5
Vulnerability Description
Signal K Server is a server application that runs on a central hub in a boat. Prior to version 2.24.0-beta.1, the SignalK Server exposes an unauthenticated HTTP endpoint that allows remote attackers to modify navigation data source priorities. This endpoint, accessible via PUT /signalk/v1/api/sourcePriorities, does not enforce authentication or authorization checks and directly assigns user-controlled input to the server configuration. As a result, attackers can influence which GPS, AIS, or other sensor data sources are trusted by the system. The changes are immediately applied and persisted to disk, allowing the manipulation to survive server restarts. This issue has been patched in version 2.24.0-beta.1.
Source: CVE Program / CVE List V5
CVSS Information
CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:N/VI:L/VA:N/SC:N/SI:N/SA:N
Source: CVE Program / CVE List V5
Vulnerability Type
访问控制不恰当
Source: CVE Program / CVE List V5
Vulnerability Title
Signal K Server 访问控制错误漏洞
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 2.24.0-beta.1之前版本存在访问控制错误漏洞，该漏洞源于未经验证的端点允许修改数据源优先级，可能导致导航数据被操纵。
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 < 2.24.0-beta.1 -

II. Public POCs for CVE-2026-33951

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III. Intelligence Information for CVE-2026-33951

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Vendor Advisories for CVE-2026-33951 (1)

Same Patch Batch · SignalK · 2026-04-02 · 4 CVEs total

CVE-2026-33950 9.4 CRITICAL signalk-server: Privilege Escalation by Admin Role Injection via /enableSecurity
CVE-2026-34083 6.1 MEDIUM signalk-server: OAuth Authorization Code Theft via Unvalidated Host Header in OIDC Flow
CVE-2026-35038 signalk-server: Arbitrary Prototype Read via `from` Field Bypass

IV. Related Vulnerabilities

Same product: signalk-server
Same vendor: SignalK
Same weakness: CWE-284

V. Comments for CVE-2026-33951

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