What’s Vulnerable › Vulnerabilities

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

• Severity: medium (CVSS 6.5 v3.1)
• Exploited in the wild: not listed in CISA KEV
• EPSS: 0.3% probability of exploitation in the next 30 days
• Public exploit or detection template: yes
• Published: 2026-04-02 · updated 2026-07-21
• Weakness: CWE-20

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.

Affected products

• signalk-server: before 2.24.0 — fixed in 2.24.0

How to fix

Upgrade to a fixed version: signalk-server 2.24.0. Check the vendor advisory for mitigations.

References

• https://github.com/SignalK/signalk-server/releases/tag/v2.24.0
• https://github.com/SignalK/signalk-server/security/advisories/GHSA-qh3j-mrg8-f234

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