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CVE-2026-42086PYSEC-2026-105GHSA-FFQ5-QPVF-XQ7X

OpenC3 COSMOS: Self-XSS in the Command Sender

Published
Last modified
published
Not listed in CISA KEV
Fix
Fixed in 7.0.0
None on Exploit-DB, Metasploit or GitHub
  • Exploitation: poc
  • Automatable: no
  • Technical impact: partial

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.

Timeline

  1. CVE published
  2. CISA SSVC assessment

    Exploitation: poc · Automatable: no · Technical impact: partial

  3. Record last updated

Affected versions

  • OpenC3 cosmos

    fixed in 7.0.0

  • openc3PyPI

    fixed in 7.0.0

  • openc3RubyGems

    fixed in 7.0.0

References 1

GitHub · OpenC3/cosmos