{"id":"CVE-2026-42084","summary":"OpenC3 COSMOS: Hijacked session token can be used to reset password for persistence","details":"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.","aliases":["GHSA-wgx6-g857-jjf7","PYSEC-2026-2242"],"modified":"2026-07-15T01:49:18.981418417Z","published":"2026-05-04T17:11:31.853Z","database_specific":{"osv_generated_from":"https://github.com/CVEProject/cvelistV5/tree/main/cves/2026/42xxx/CVE-2026-42084.json","cna_assigner":"GitHub_M","cwe_ids":["CWE-620"]},"references":[{"type":"WEB","url":"https://github.com/OpenC3/cosmos/releases/tag/v6.10.5"},{"type":"WEB","url":"https://github.com/OpenC3/cosmos/releases/tag/v7.0.0-rc3"},{"type":"ADVISORY","url":"https://github.com/CVEProject/cvelistV5/tree/main/cves/2026/42xxx/CVE-2026-42084.json"},{"type":"ADVISORY","url":"https://github.com/OpenC3/cosmos/security/advisories/GHSA-wgx6-g857-jjf7"},{"type":"ADVISORY","url":"https://nvd.nist.gov/vuln/detail/CVE-2026-42084"},{"type":"FIX","url":"https://github.com/OpenC3/cosmos/commit/2e623714e3426d5ae81b6f8239d4a2a6937ef776"}],"affected":[{"ranges":[{"type":"GIT","repo":"https://github.com/openc3/cosmos","events":[{"introduced":"0"},{"fixed":"13ea2c8deb37ac3f306fee264e725602e5a6cf1a"},{"introduced":"132648bad3b202bc5acf4d099d0af2341ec97047"},{"fixed":"2e623714e3426d5ae81b6f8239d4a2a6937ef776"},{"fixed":"c3ea3499cc01801122361524f6ccce2fdfbc35f0"}],"database_specific":{"source":["CPE_RANGE","CPE_STRING","REFERENCES"],"cpe":["cpe:2.3:a:openc3:cosmos:*:*:*:*:open_source:*:*:*","cpe:2.3:a:openc3:cosmos:7.0.0:rc1:*:*:open_source:*:*:*","cpe:2.3:a:openc3:cosmos:7.0.0:rc2:*:*:open_source:*:*:*"],"extracted_events":[{"introduced":"0"},{"fixed":"6.10.5"},{"introduced":"7.0.0-rc1"},{"last_affected":"7.0.0-rc1"},{"introduced":"7.0.0-rc2"},{"last_affected":"7.0.0-rc2"}]}}],"versions":["7.0.0-rc1","7.0.0-rc2","v6.10.4","v7.0.0-rc2","v7.0.0-rc1","v6.10.3","v6.10.2","v6.10.1","v6.10.0","v6.9.2","v6.9.1","v6.9.0","v6.8.1","v6.7.0","v6.6.0","v6.5.1","v6.5.0","v6.4.2","v6.4.1","v6.4.0","v6.3.0","v6.2.1","v6.2.0","v6.1.0","v6.0.2","v6.0.1","v6.0.0","v5.20.0","v5.19.0","v5.18.0","v5.17.1","v5.17.0","v5.16.2","v5.16.1","v5.16.0","v5.15.2","v5.15.1","v5.15.0","v5.14.2","v5.14.1","v5.14.0","v5.13.0","v5.12.0","v5.11.3","v5.11.2","v5.11.1","v5.11.0","v5.10.1","v5.10.0","v5.9.1","v5.9.0","v5.8.1","v5.8.0","v5.7.2","v5.7.0","v5.6.1","v5.6.0","v5.5.2","v5.5.2-beta0","v5.5.1","v5.5.0","v5.5.0-beta0","v5.4.3-beta0","v5.4.2","v5.4.1","v5.4.0","v5.3.0","v5.2.0","v5.1.1","v5.1.0","v5.0.11","v5.0.10","v5.0.9","v5.0.8","v5.0.7","v5.0.5","v5.0.4","v5.0.3","v5.0.2","v5.0.1","v5.0.0","v5.0.0.beta2","v5.0.0-beta.1","v4.3.0","v4.2.3","v4.1.1","v4.1.0","v4.0.3","v4.0.2","v4.0.1","v4.0.0","v3.9.2","v3.9.1","v3.9.0","v3.8.3","v3.8.2","v3.8.1","v3.8.0","v3.7.0","v3.6.2","v3.6.1","v3.6.0","v3.5.1","v3.4.2","v3.4.1","v3.4.0","v3.3.1","v3.3.0","v3.2.1","v3.1.2","v3.1.1","v3.1.0","v3.0.0"],"database_specific":{"source":"https://storage.googleapis.com/cve-osv-conversion/osv-output/CVE-2026-42084.json"}}],"schema_version":"1.7.5","severity":[{"type":"CVSS_V3","score":"CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:N"}]}