{"id":"CVE-2026-42084","state":"PUBLISHED","title":"OpenC3 COSMOS: Hijacked session token can be used to reset password for persistence","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.","publishedAt":"2026-05-04T17:11:31.853Z","updatedAt":"2026-05-06T13:39:58.104Z","severity":{"score":8.1,"label":"High","version":"3.1","vector":"CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:N","source":"GitHub_M"},"assigner":"GitHub_M","products":["OpenC3 cosmos"],"affected":[{"vendor":"OpenC3","product":"cosmos","versions":[{"version":"< 6.10.5","status":"affected"},{"version":">= 7.0.0.pre.rc1, < 7.0.0-rc3","status":"affected"}]}],"references":["https://github.com/OpenC3/cosmos/security/advisories/GHSA-wgx6-g857-jjf7","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"],"weaknesses":["CWE-620"],"ingestedAt":"2026-10-29T20:11:57.932Z","source":{"repository":"CVEProject/cvelistV5","path":"cves/2026/42xxx/CVE-2026-42084.json","commit":"556c9d3a8cd17e218bb8e452ba7cd619a384ff47"},"raw":{"dataType":"CVE_RECORD","dataVersion":"5.2","cveMetadata":{"cveId":"CVE-2026-42084","state":"PUBLISHED","datePublished":"2026-05-04T17:11:31.853Z","dateUpdated":"2026-05-06T13:39:58.104Z","assignerShortName":"GitHub_M","assignerOrgId":"a0819718-46f1-4df5-94e2-005712e83aaa","dateReserved":"2026-04-23T19:17:30.566Z"},"containers":{"cna":{"title":"OpenC3 COSMOS: Hijacked session token can be used to reset password for persistence","descriptions":[{"lang":"en","value":"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."}],"affected":[{"vendor":"OpenC3","product":"cosmos","versions":[{"version":"< 6.10.5","status":"affected"},{"version":">= 7.0.0.pre.rc1, < 7.0.0-rc3","status":"affected"}]}],"references":[{"url":"https://github.com/OpenC3/cosmos/security/advisories/GHSA-wgx6-g857-jjf7","name":"https://github.com/OpenC3/cosmos/security/advisories/GHSA-wgx6-g857-jjf7","tags":["x_refsource_CONFIRM"]},{"url":"https://github.com/OpenC3/cosmos/commit/2e623714e3426d5ae81b6f8239d4a2a6937ef776","name":"https://github.com/OpenC3/cosmos/commit/2e623714e3426d5ae81b6f8239d4a2a6937ef776","tags":["x_refsource_MISC"]},{"url":"https://github.com/OpenC3/cosmos/releases/tag/v6.10.5","name":"https://github.com/OpenC3/cosmos/releases/tag/v6.10.5","tags":["x_refsource_MISC"]},{"url":"https://github.com/OpenC3/cosmos/releases/tag/v7.0.0-rc3","name":"https://github.com/OpenC3/cosmos/releases/tag/v7.0.0-rc3","tags":["x_refsource_MISC"]}],"metrics":[{"cvssV3_1":{"attackComplexity":"LOW","attackVector":"NETWORK","availabilityImpact":"NONE","baseScore":8.1,"baseSeverity":"HIGH","confidentialityImpact":"HIGH","integrityImpact":"HIGH","privilegesRequired":"LOW","scope":"UNCHANGED","userInteraction":"NONE","vectorString":"CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:N","version":"3.1"}}],"problemTypes":[{"descriptions":[{"cweId":"CWE-620","lang":"en","description":"CWE-620: Unverified Password Change","type":"CWE"}]}],"providerMetadata":{"shortName":"GitHub_M","orgId":"a0819718-46f1-4df5-94e2-005712e83aaa","dateUpdated":"2026-05-04T17:11:31.853Z"},"source":{"advisory":"GHSA-wgx6-g857-jjf7","discovery":"UNKNOWN"}},"adp":[{"title":"CISA ADP Vulnrichment","references":[{"url":"https://github.com/OpenC3/cosmos/security/advisories/GHSA-wgx6-g857-jjf7","tags":["exploit"]}],"metrics":[{"other":{"type":"ssvc","content":{"timestamp":"2026-05-06T13:39:31.426814Z","id":"CVE-2026-42084","options":[{"Exploitation":"poc"},{"Automatable":"no"},{"Technical Impact":"total"}],"role":"CISA Coordinator","version":"2.0.3"}}}],"providerMetadata":{"shortName":"CISA-ADP","orgId":"134c704f-9b21-4f2e-91b3-4a467353bcc0","dateUpdated":"2026-05-06T13:39:58.104Z"}}]}}}