{
  "affected": [
    {
      "affectedData": [
        {
          "product": "cosmos",
          "vendor": "OpenC3",
          "versions": [
            {
              "status": "affected",
              "version": "\u003c 7.0.0"
            }
          ]
        }
      ],
      "source": "security-advisories@github.com"
    }
  ],
  "configurations": [
    {
      "nodes": [
        {
          "cpeMatch": [
            {
              "criteria": "cpe:2.3:a:openc3:cosmos:*:*:*:*:open_source:*:*:*",
              "matchCriteriaId": "286B983F-D46F-46E4-8EEA-FFA6506A005B",
              "versionEndExcluding": "7.0.0",
              "vulnerable": true
            },
            {
              "criteria": "cpe:2.3:a:openc3:cosmos:7.0.0:rc1:*:*:open_source:*:*:*",
              "matchCriteriaId": "38B72355-49A3-4D2F-BFDB-EE53C9E2C7AD",
              "vulnerable": true
            },
            {
              "criteria": "cpe:2.3:a:openc3:cosmos:7.0.0:rc2:*:*:open_source:*:*:*",
              "matchCriteriaId": "13E3A0EA-1085-4505-80BB-C0B133EC3498",
              "vulnerable": true
            },
            {
              "criteria": "cpe:2.3:a:openc3:cosmos:7.0.0:rc3:*:*:open_source:*:*:*",
              "matchCriteriaId": "3826B062-66B3-42BB-80C3-A1CD76AD038A",
              "vulnerable": true
            }
          ],
          "negate": false,
          "operator": "OR"
        }
      ]
    }
  ],
  "cveTags": [],
  "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 version 7.0.0, the Command Sender UI uses an unsafe eval() function on array-like command parameters, which allows a user-supplied payload to execute in the browser when sending a command. This creates a self-XSS risk because an attacker can trigger their own script execution in the victim\u2019s session, if allowed to influence the array parameter input, for example via phishing. If successful, an attacker may read or modify data in the authenticated browser context, including session tokens in local storage. This issue has been patched in version 7.0.0."
    },
    {
      "lang": "es",
      "value": "OpenC3 COSMOS proporciona la funcionalidad necesaria para enviar comandos a y recibir datos de uno o m\u00e1s sistemas embebidos. Antes de la versi\u00f3n 7.0.0, la interfaz de usuario (UI) del Enviador de Comandos utiliza una funci\u00f3n eval() insegura en par\u00e1metros de comando tipo array, lo que permite que una carga \u00fatil suministrada por el usuario se ejecute en el navegador al enviar un comando. Esto crea un riesgo de self-XSS porque un atacante puede desencadenar la ejecuci\u00f3n de su propio script en la sesi\u00f3n de la v\u00edctima, si se le permite influir en la entrada del par\u00e1metro array, por ejemplo, a trav\u00e9s de phishing. Si tiene \u00e9xito, un atacante puede leer o modificar datos en el contexto autenticado del navegador, incluyendo tokens de sesi\u00f3n en el almacenamiento local. Este problema ha sido parcheado en la versi\u00f3n 7.0.0."
    }
  ],
  "id": "CVE-2026-42086",
  "lastModified": "2026-10-26T19:10:00.163",
  "metrics": {
    "cvssMetricV31": [
      {
        "cvssData": {
          "attackComplexity": "LOW",
          "attackVector": "NETWORK",
          "availabilityImpact": "NONE",
          "baseScore": 4.6,
          "baseSeverity": "MEDIUM",
          "confidentialityImpact": "LOW",
          "integrityImpact": "LOW",
          "privilegesRequired": "LOW",
          "scope": "UNCHANGED",
          "userInteraction": "REQUIRED",
          "vectorString": "CVSS:3.1/AV:N/AC:L/PR:L/UI:R/S:U/C:L/I:L/A:N",
          "version": "3.1"
        },
        "exploitabilityScore": 2.1,
        "impactScore": 2.5,
        "source": "security-advisories@github.com",
        "type": "Secondary"
      }
    ],
    "ssvcV203": [
      {
        "source": "134c704f-9b21-4f2e-91b3-4a467353bcc0",
        "ssvcData": {
          "id": "CVE-2026-42086",
          "options": [
            {
              "exploitation": "poc"
            },
            {
              "automatable": "no"
            },
            {
              "technicalImpact": "partial"
            }
          ],
          "role": "CISA Coordinator",
          "timestamp": "2026-05-04T19:46:44.788122Z",
          "version": "2.0.3"
        }
      }
    ]
  },
  "published": "2026-05-04T18:16:30.667",
  "references": [
    {
      "source": "security-advisories@github.com",
      "tags": [
        "Exploit",
        "Vendor Advisory"
      ],
      "url": "https://github.com/OpenC3/cosmos/security/advisories/GHSA-ffq5-qpvf-xq7x"
    },
    {
      "source": "134c704f-9b21-4f2e-91b3-4a467353bcc0",
      "tags": [
        "Exploit",
        "Vendor Advisory"
      ],
      "url": "https://github.com/OpenC3/cosmos/security/advisories/GHSA-ffq5-qpvf-xq7x"
    }
  ],
  "sourceIdentifier": "security-advisories@github.com",
  "vulnStatus": "Analyzed",
  "weaknesses": [
    {
      "description": [
        {
          "lang": "en",
          "value": "CWE-79"
        }
      ],
      "source": "security-advisories@github.com",
      "type": "Secondary"
    }
  ]
}