CVE-2026-35038 SignalK CVE debrief

Who should care

Users of Signal K Server prior to version 2.24.0 should apply the patch to prevent low-privileged authenticated users from exploiting this vulnerability. This includes administrators and security teams responsible for maintaining and securing Signal K Server installations. Applying the patch will prevent unauthorized access to internal functions and properties of the global prototype object.

Technical summary

The vulnerability allows a low-privileged authenticated user to bypass prototype boundary filtering and extract internal functions and properties from the global prototype object. This issue has been patched in version 2.24.0 of Signal K Server. The patch prevents low-privileged authenticated users from exploiting this vulnerability, thus maintaining data isolation. Technical details indicate that the vulnerability is related to how Signal K Server handles prototype objects, and the fix involves updating the server software.

Defensive priority

Apply the patch to prevent exploitation. Ensure that Signal K Server is updated to version 2.24.0 or later. Restrict access to authenticated users with low privileges and monitor for suspicious activity related to prototype boundary filtering.

Recommended defensive actions

• Apply the patch by updating Signal K Server to version 2.24.0 or later
• Restrict access to authenticated users with low privileges
• Monitor for suspicious activity related to prototype boundary filtering
• Review compensating controls for exposed systems while remediation is scheduled and verified
• Check relevant monitoring, detection, and logs for exposed assets that need extra review
• Track exceptions, retest remediated assets, and close the item only after evidence is documented
• Confirm whether affected product deployments exist in managed environments and assign an owner for follow-up

Evidence notes

The CVE record was published on 2026-04-02T17:16:27.163Z and last modified on 2026-07-21T19:10:00.107Z. The NVD entry is currently Analyzed. This information is based on the provided source corpus. To verify, defenders should check the official CVE record and NVD entry for any updates. The vulnerability affects Signal K Server before version 2.24.0. Evidence limits suggest that further details may be available through vendor advisories or security research publications.

Official resources