{
  "affected": [
    {
      "ranges": [
        {
          "database_specific": {
            "extracted_events": [
              {
                "introduced": "5.1.0"
              },
              {
                "fixed": "7.3.0"
              }
            ],
            "source": [
              "AFFECTED_FIELD",
              "REFERENCES"
            ]
          },
          "events": [
            {
              "introduced": "b39e7b7031bcf5830b9c1ec8dc8f52508bfc17ef"
            },
            {
              "fixed": "71943352a28128ef3e7e894319d97a656b5cd4f2"
            },
            {
              "fixed": "7a1538a4626f82c0d1540fcaa27ffdcbbd71ff81"
            }
          ],
          "repo": "https://github.com/openc3/cosmos",
          "type": "GIT"
        }
      ]
    }
  ],
  "aliases": [
    "GHSA-jjq7-m736-w977"
  ],
  "database_specific": {
    "cna_assigner": "GitHub_M",
    "cwe_ids": [
      "CWE-94"
    ],
    "osv_generated_from": "https://github.com/CVEProject/cvelistV5/tree/main/cves/2026/77xxx/CVE-2026-77602.json"
  },
  "details": "OpenC3 COSMOS provides the functionality needed to send commands to and receive data from one or more embedded systems. From 5.1.0 until 7.3.0, authenticated non-administrator users can write content under targets_modified/ that is later executed by multiple configuration paths below the intended code-execution privilege tier. Table and command or telemetry definitions are processed through ConfigParser, PacketConfig, GENERIC_READ_CONVERSION, or GENERIC_WRITE_CONVERSION, allowing ERB rendering or Ruby and Python evaluation, while openc3-cosmos-script-runner-api/scripts/run_suite_analysis.rb executes suite procedure files through require. Storage uploads, screen saves, and script creation can place content in the overlay, and triggering table processing, a cmd/tlm reload, or suite analysis executes the content in cmd-tlm-api, decom microservices, or Script Runner with access to internal credentials and data. This issue is fixed in version 7.3.0.",
  "id": "CVE-2026-77602",
  "modified": "2026-09-30T03:30:48.407911816Z",
  "published": "2026-09-23T18:56:16.967Z",
  "references": [
    {
      "type": "ADVISORY",
      "url": "https://github.com/CVEProject/cvelistV5/tree/main/cves/2026/77xxx/CVE-2026-77602.json"
    },
    {
      "type": "ADVISORY",
      "url": "https://github.com/OpenC3/cosmos/security/advisories/GHSA-jjq7-m736-w977"
    },
    {
      "type": "ADVISORY",
      "url": "https://nvd.nist.gov/vuln/detail/CVE-2026-77602"
    },
    {
      "type": "FIX",
      "url": "https://github.com/OpenC3/cosmos/commit/71943352a28128ef3e7e894319d97a656b5cd4f2"
    },
    {
      "type": "FIX",
      "url": "https://github.com/OpenC3/cosmos/commit/7a1538a4626f82c0d1540fcaa27ffdcbbd71ff81"
    },
    {
      "type": "FIX",
      "url": "https://github.com/OpenC3/cosmos/pull/3488"
    }
  ],
  "schema_version": "1.9.0",
  "severity": [
    {
      "score": "CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:C/C:H/I:H/A:H",
      "type": "CVSS_V3"
    }
  ],
  "summary": "OpenC3 COSMOS: Authenticated remote code execution via the user-writable config overlay (table definitions, cmd/tlm definitions, and script suites)"
}