CVE-2026-42084
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 3.1
- 8.1
CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:N - EPSS
- 0.3% chance of exploitation in the next 30 days; higher than 23% of CVEs (scores of 2026-10-26)
- CWE
- CWE-620
- Published
- Modified
- Record from
- the NVD, synced
Affected
- openc3:cosmos
Packages (OSV)
| Advisory | Ecosystem | Package | Affected | Fixed in |
|---|---|---|---|---|
| GHSA-wgx6-g857-jjf7 | RubyGems | openc3 | <6.10.5 | 6.10.5 |
| GHSA-wgx6-g857-jjf7 | RubyGems | openc3 | >=7.0.0.pre.rc1 <7.0.0-rc3 | 7.0.0-rc3 |
| PYSEC-2026-2242 | PyPI | openc3 | <6.10.5 | 6.10.5 |
References
- https://github.com/OpenC3/cosmos/commit/2e623714e3426d5ae81b6f8239d4a2a6937ef776
- https://github.com/OpenC3/cosmos/releases/tag/v6.10.5
- https://github.com/OpenC3/cosmos/releases/tag/v7.0.0-rc3
- https://github.com/OpenC3/cosmos/security/advisories/GHSA-wgx6-g857-jjf7
- https://github.com/OpenC3/cosmos/security/advisories/GHSA-wgx6-g857-jjf7