Vulnerability Description
OpenC3 COSMOS provides the functionality needed to send commands to and receive data from one or more embedded systems. Prior to versions 6.10.5 and 7.0.0-rc3, the OpenC3 password change functionality allows a user to change their password without providing the old password, by accepting a valid session token instead. In assumed breach scenarios, this behaviour can be exploited by an attacker who has already obtained a valid session token, to gain persistence in hijacked account (including admin) and prevent legitimate users from accessing the account. This issue has been patched in versions 6.10.5 and 7.0.0-rc3.
CVSS Score
HIGH
Affected Products
| Vendor | Product | Versions |
|---|---|---|
| Openc3 | Cosmos | < 6.10.5 |
Related Weaknesses (CWE)
References
- https://github.com/OpenC3/cosmos/commit/2e623714e3426d5ae81b6f8239d4a2a6937ef776Patch
- https://github.com/OpenC3/cosmos/releases/tag/v6.10.5Release Notes
- https://github.com/OpenC3/cosmos/releases/tag/v7.0.0-rc3Release Notes
- https://github.com/OpenC3/cosmos/security/advisories/GHSA-wgx6-g857-jjf7ExploitVendor Advisory
- https://github.com/OpenC3/cosmos/security/advisories/GHSA-wgx6-g857-jjf7ExploitVendor Advisory
FAQ
What is CVE-2026-42084?
CVE-2026-42084 is a vulnerability with a CVSS score of 8.1 (HIGH). OpenC3 COSMOS provides the functionality needed to send commands to and receive data from one or more embedded systems. Prior to versions 6.10.5 and 7.0.0-rc3, the OpenC3 password change functionality...
How severe is CVE-2026-42084?
CVE-2026-42084 has been rated HIGH with a CVSS base score of 8.1/10. Review the CVSS metrics above for detailed severity breakdown.
Is there a patch for CVE-2026-42084?
Check the references section above for vendor advisories and patch information. Affected products include: Openc3 Cosmos.