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CVE-2026-35038— signalk-server: Arbitrary Prototype Read via `from` Field Bypass

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之前版本存在信息泄露漏洞，该漏洞源于from字段绕过原型边界过滤，可能导致信息泄露。

AI Predicted 6.5 Difficulty: Easy EPSS 0.41% · P33

Possible ATT&CK Techniques 1 AI

T1005 · Data from Local System
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I. Basic Information for CVE-2026-35038

Vulnerability Information
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Vulnerability Title
signalk-server: Arbitrary Prototype Read via `from` Field Bypass
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, there is an arbitrary prototype read vulnerability via `from` field bypass. This vulnerability allows a low-privileged authenticated user to bypass prototype boundary filtering to extract internal functions and properties from the global prototype object this violates data isolation and lets a user read more than they should. This issue has been patched in version 2.24.0.
Source: CVE Program / CVE List V5
CVSS Information
CVSS:4.0/AV:N/AC:L/AT:N/PR:L/UI:N/VC:L/VI:N/VA:N/SC:N/SI:N/SA:N/E:P
Source: CVE Program / CVE List V5
Vulnerability Type
输入验证不恰当
Source: CVE Program / CVE List V5
Vulnerability Title
Signal K Server 信息泄露漏洞
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之前版本存在信息泄露漏洞，该漏洞源于from字段绕过原型边界过滤，可能导致信息泄露。
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 -

II. Public POCs for CVE-2026-35038

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III. Intelligence Information for CVE-2026-35038

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Vendor Advisories for CVE-2026-35038 (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-2026-33951 signalk-server: Unauthenticated Source Priorities Manipulation

IV. Related Vulnerabilities

Same product: signalk-server
Same vendor: SignalK
Same weakness: CWE-20

V. Comments for CVE-2026-35038

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