cvedb.io
CVE-2026-42086
MEDIUM · CVSS 4.6
EPSS exploitation probability: 0%
Published 2026-05-04T18:16:30.667 · Last modified 2026-06-17T10:47:24.773

Summary

OpenC3 COSMOS provides the functionality needed to send commands to and receive data from one or more embedded systems. Prior to version 7.0.0, the Command Sender UI uses an unsafe eval() function on array-like command parameters, which allows a user-supplied payload to execute in the browser when sending a command. This creates a self-XSS risk because an attacker can trigger their own script execution in the victim’s session, if allowed to influence the array parameter input, for example via phishing. If successful, an attacker may read or modify data in the authenticated browser context, including session tokens in local storage. This issue has been patched in version 7.0.0.

Affected products

openc3 — cosmos

Does this affect you?

Add your gear to cvedb and we'll alert you only when openc3 ships something exploited.

Check my exposure →

References

This product uses data from the NVD API but is not endorsed or certified by the NVD. Informational only; not professional security advice.