{
  "affected": [
    {
      "ranges": [
        {
          "database_specific": {
            "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"
              }
            ],
            "source": [
              "CPE_RANGE",
              "CPE_STRING",
              "REFERENCES"
            ]
          },
          "events": [
            {
              "introduced": "0"
            },
            {
              "fixed": "13ea2c8deb37ac3f306fee264e725602e5a6cf1a"
            },
            {
              "introduced": "132648bad3b202bc5acf4d099d0af2341ec97047"
            },
            {
              "fixed": "2e623714e3426d5ae81b6f8239d4a2a6937ef776"
            },
            {
              "fixed": "c3ea3499cc01801122361524f6ccce2fdfbc35f0"
            }
          ],
          "repo": "https://github.com/openc3/cosmos",
          "type": "GIT"
        }
      ],
      "versions": [
        "7.0.0-rc1",
        "7.0.0-rc2"
      ]
    }
  ],
  "aliases": [
    "GHSA-wgx6-g857-jjf7"
  ],
  "database_specific": {
    "cna_assigner": "GitHub_M",
    "cwe_ids": [
      "CWE-620"
    ],
    "osv_generated_from": "https://github.com/CVEProject/cvelistV5/tree/main/cves/2026/42xxx/CVE-2026-42084.json"
  },
  "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.",
  "id": "CVE-2026-42084",
  "modified": "2026-07-15T01:49:18.981418417Z",
  "published": "2026-05-04T17:11:31.853Z",
  "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"
    }
  ],
  "schema_version": "1.8.0",
  "severity": [
    {
      "score": "CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:N",
      "type": "CVSS_V3"
    }
  ],
  "summary": "OpenC3 COSMOS: Hijacked session token can be used to reset password for persistence"
}