{"id":"CVE-2026-42084","aliases":["PYSEC-2026-2242","GHSA-wgx6-g857-jjf7"],"title":"OpenC3 COSMOS provides the functionality needed to send commands to and receive data from one or more embedded systems. Prior to versions…","summary":"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 passwo…","severity":"high","cvss":8.1,"cvssVector":"CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:N","vendor":"openc3","product":"openc3","ecosystem":"pip","affected":["openc3 < 6.10.5"],"patched":["openc3 6.10.5"],"published":"2026-05-04","updated":"2026-07-13","source":"OSV","sourceUrl":"https://osv.dev/vulnerability/PYSEC-2026-2242","references":[{"url":"https://github.com/OpenC3/cosmos/releases/tag/v6.10.5"},{"url":"https://github.com/OpenC3/cosmos/releases/tag/v7.0.0-rc3"},{"url":"https://github.com/OpenC3/cosmos/commit/2e623714e3426d5ae81b6f8239d4a2a6937ef776"},{"url":"https://github.com/OpenC3/cosmos/security/advisories/GHSA-wgx6-g857-jjf7"}],"tags":["osv","pip"],"epss":0.0044,"epssPercentile":0.35561,"ingestedAt":"2026-07-13T18:58:08.414Z","slug":"CVE-2026-42084","body":"## Overview\n\nOpenC3 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.\n\n## Affected packages\n\n- `openc3 < 6.10.5`\n\n## Remediation\n\nUpgrade to a patched release:\n\n- `openc3 6.10.5`","depth":"twilight","depthScore":45,"depthScoreParts":{"impact":44.6,"likelihood":0.1,"exploitation":0,"ransomware":0},"changes":[]}