OpenC3 COSMOS: Authenticated remote code execution via the user-writable config overlay (table definitions, cmd/tlm definitions, and script suites)

{
  "id": "208e6a3aeec37ffdc309b6791f5f931f4fdf4a8acc348e0fa6efca40ef35f09a",
  "url": "https://osv.dev/vulnerability/CVE-2026-77602",
  "method": "structured",
  "payload": {
    "kind": "advisory",
    "title": "OpenC3 COSMOS: Authenticated remote code execution via the user-writable config overlay (table definitions, cmd/tlm definitions, and script suites)",
    "summary": "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.",
    "evidence": "osv:CVE-2026-77602",
    "products": [],
    "severity": "critical",
    "structured": {
      "id": "CVE-2026-77602",
      "aliases": [
        "CVE-2026-77602",
        "GHSA-jjq7-m736-w977"
      ],
      "metrics": [
        {
          "type": "CVSS_V3",
          "score": "CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:C/C:H/I:H/A:H"
        }
      ],
      "affected": [
        {
          "ranges": [
            {
              "repo": "https://github.com/openc3/cosmos",
              "type": "GIT",
              "events": [
                {
                  "introduced": "b39e7b7031bcf5830b9c1ec8dc8f52508bfc17ef"
                },
                {
                  "fixed": "92f8c99cc8ed704d2cf747832f09b72d64b6fa65"
                },
                {
                  "fixed": "71943352a28128ef3e7e894319d97a656b5cd4f2"
                },
                {
                  "fixed": "7a1538a4626f82c0d1540fcaa27ffdcbbd71ff81"
                }
              ],
              "database_specific": {
                "extracted_events": [
                  {
                    "range": [
                      {
                        "introduced": "5.1.0"
                      },
                      {
                        "fixed": "7.3.0"
                      }
                    ],
                    "source": "AFFECTED_FIELD",
                    "strategy": "StringRangeExpression"
                  },
                  {
                    "range": [
                      {
                        "fixed": "71943352a28128ef3e7e894319d97a656b5cd4f2"
                      }
                    ],
                    "source": "REFERENCES_COMMIT"
                  },
                  {
                    "range": [
                      {
                        "fixed": "7a1538a4626f82c0d1540fcaa27ffdcbbd71ff81"
                      }
                    ],
                    "source": "REFERENCES_COMMIT"
                  }
                ]
              }
            }
          ],
          "versions": [
            "v7.2.1",
            "v7.2.0",
            "v7.1.1",
            "v7.1.0",
            "v6.10.4",
            "v7.0.1",
            "v7.0.0",
            "v7.0.0-rc3",
            "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"
          ],
          "database_specific": {
            "source": "https://storage.googleapis.com/cve-osv-conversion/osv-output/CVE-2026-77602.json"
          }
        }
      ],
      "modified": "2026-10-28T02:30:36.043590406Z",
      "provider": "osv",
      "references": [
        "https://github.com/CVEProject/cvelistV5/tree/main/cves/2026/77xxx/CVE-2026-77602.json",
        "https://github.com/OpenC3/cosmos/security/advisories/GHSA-jjq7-m736-w977",
        "https://nvd.nist.gov/vuln/detail/CVE-2026-77602",
        "https://github.com/OpenC3/cosmos/commit/71943352a28128ef3e7e894319d97a656b5cd4f2",
        "https://github.com/OpenC3/cosmos/commit/7a1538a4626f82c0d1540fcaa27ffdcbbd71ff81",
        "https://github.com/OpenC3/cosmos/pull/3488"
      ],
      "provider_metadata": {
        "cwe_ids": [
          "CWE-94"
        ],
        "cna_assigner": "GitHub_M",
        "osv_generated_from": "https://github.com/CVEProject/cvelistV5/tree/main/cves/2026/77xxx/CVE-2026-77602.json"
      }
    },
    "related_cves": [
      {
        "value": "CVE-2026-77602",
        "evidence": "/id"
      }
    ],
    "security_relevant": true,
    "severity_evidence": "/severity/0/score"
  },
  "source_id": "core-osv",
  "document_id": 503390,
  "published_at": "2026-09-23T18:56:16.967+00:00"
}