Vulnerability · Published Apr 2, 2026 · Assigned by GitHub_M
CVE-2026-35038signalk-server: Arbitrary Prototype Read via `from` Field Bypass
Low 2.1
In plain English
A low-severity improper input validation in signalk-server from SignalK. Proof-of-concept exploit code is public. The chance it is exploited in the next 30 days is estimated at 0.3% (higher than 24% of all known vulnerabilities). Fixed versions are available - upgrade the affected package.
Official 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 packages & fixed versions
| Ecosystem | Package | Fixed in | Advisory |
|---|---|---|---|
| npm | signalk-server | 2.24.0 | GHSA-qh3j-mrg8-f234 |
Affected products (as reported)
| Vendor | Product | Versions |
|---|---|---|
| SignalK | signalk-server | < 2.24.0 |
Weakness: CWE-20, CWE-125, CWE-200 · Vector: 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
References
- https://github.com/SignalK/signalk-server/security/advisories/GHSA-qh3j-mrg8-f234 x_refsource_CONFIRM
- https://github.com/SignalK/signalk-server/releases/tag/v2.24.0 x_refsource_MISC