CVE-2026-47211

{
  "id": "CVE-2026-47211",
  "sourceIdentifier": "[email protected]",
  "published": "2026-08-03T20:17:24.030",
  "lastModified": "2026-10-23T21:10:00.157",
  "vulnStatus": "Deferred",
  "cveTags": [],
  "descriptions": [
    {
      "lang": "en",
      "value": "Ouroboros is a local-first runtime for AI coding agents that records their actions and applies user-defined policies to constrain behavior. In versions prior to 0.39.0, if a user clones a malicious repository and runs Ouroboros commands within that directory, it can lead to arbitrary code execution and potential system takeover. The vulnerability stems from Ouroboros loading the .env file from the current working directory. Execution-affecting environment variables such as OUROBOROS_CLI_PATH, OPENCODE_CLI_PATH, and other backend selectors are accepted directly from this local .env. An attacker can include a malicious script in the repository and point the CLI path variable to it (e.g., OUROBOROS_CLI_PATH=./malicious_script.sh). When the user executes a command like ouroboros init or any command that instantiates the adapter, the malicious script is executed instead of the intended CLI. This issue has been fixed in version 0.39.0."
    },
    {
      "lang": "es",
      "value": "Ouroboros es un entorno de ejecución (runtime) local-first para agentes de codificación de IA que registra sus acciones y aplica políticas definidas por el usuario para restringir el comportamiento. En versiones anteriores a la 0.39.0, si un usuario clona un repositorio malicioso y ejecuta comandos de Ouroboros dentro de ese directorio, puede llevar a la ejecución de código arbitrario y a una posible toma de control del sistema. La vulnerabilidad se origina en que Ouroboros carga el archivo .env desde el directorio de trabajo actual. Las variables de entorno que afectan la ejecución, como OUROBOROS_CLI_PATH, OPENCODE_CLI_PATH y otros selectores de backend, se aceptan directamente de este .env local. Un atacante puede incluir un script malicioso en el repositorio y apuntar la variable de ruta de la CLI hacia él (por ejemplo, OUROBOROS_CLI_PATH=./malicious_script.sh). Cuando el usuario ejecuta un comando como ouroboros init o cualquier comando que instancie el adaptador, el script malicioso se ejecuta en lugar de la CLI prevista. Este problema ha sido solucionado en la versión 0.39.0."
    }
  ],
  "affected": [
    {
      "source": "[email protected]",
      "affectedData": [
        {
          "vendor": "Q00",
          "product": "ouroboros",
          "versions": [
            {
              "version": "< 0.39.0",
              "status": "affected"
            }
          ]
        }
      ]
    }
  ],
  "metrics": {
    "cvssMetricV40": [
      {
        "source": "[email protected]",
        "type": "Secondary",
        "cvssData": {
          "version": "4.0",
          "vectorString": "CVSS:4.0/AV:L/AC:L/AT:N/PR:N/UI:A/VC:H/VI:H/VA:H/SC:N/SI:N/SA:N/E:X/CR:X/IR:X/AR:X/MAV:X/MAC:X/MAT:X/MPR:X/MUI:X/MVC:X/MVI:X/MVA:X/MSC:X/MSI:X/MSA:X/S:X/AU:X/R:X/V:X/RE:X/U:X",
          "baseScore": 8.4,
          "baseSeverity": "HIGH",
          "attackVector": "LOCAL",
          "attackComplexity": "LOW",
          "attackRequirements": "NONE",
          "privilegesRequired": "NONE",
          "userInteraction": "ACTIVE",
          "vulnConfidentialityImpact": "HIGH",
          "vulnIntegrityImpact": "HIGH",
          "vulnAvailabilityImpact": "HIGH",
          "subConfidentialityImpact": "NONE",
          "subIntegrityImpact": "NONE",
          "subAvailabilityImpact": "NONE",
          "exploitMaturity": "NOT_DEFINED",
          "confidentialityRequirement": "NOT_DEFINED",
          "integrityRequirement": "NOT_DEFINED",
          "availabilityRequirement": "NOT_DEFINED",
          "modifiedAttackVector": "NOT_DEFINED",
          "modifiedAttackComplexity": "NOT_DEFINED",
          "modifiedAttackRequirements": "NOT_DEFINED",
          "modifiedPrivilegesRequired": "NOT_DEFINED",
          "modifiedUserInteraction": "NOT_DEFINED",
          "modifiedVulnConfidentialityImpact": "NOT_DEFINED",
          "modifiedVulnIntegrityImpact": "NOT_DEFINED",
          "modifiedVulnAvailabilityImpact": "NOT_DEFINED",
          "modifiedSubConfidentialityImpact": "NOT_DEFINED",
          "modifiedSubIntegrityImpact": "NOT_DEFINED",
          "modifiedSubAvailabilityImpact": "NOT_DEFINED",
          "Safety": "NOT_DEFINED",
          "Automatable": "NOT_DEFINED",
          "Recovery": "NOT_DEFINED",
          "valueDensity": "NOT_DEFINED",
          "vulnerabilityResponseEffort": "NOT_DEFINED",
          "providerUrgency": "NOT_DEFINED"
        }
      }
    ],
    "ssvcV203": [
      {
        "source": "134c704f-9b21-4f2e-91b3-4a467353bcc0",
        "ssvcData": {
          "timestamp": "2026-08-03T21:06:50.835317Z",
          "id": "CVE-2026-47211",
          "options": [
            {
              "exploitation": "none"
            },
            {
              "automatable": "no"
            },
            {
              "technicalImpact": "total"
            }
          ],
          "role": "CISA Coordinator",
          "version": "2.0.3"
        }
      }
    ]
  },
  "weaknesses": [
    {
      "source": "[email protected]",
      "type": "Secondary",
      "description": [
        {
          "lang": "en",
          "value": "CWE-426"
        }
      ]
    }
  ],
  "references": [
    {
      "url": "https://github.com/Q00/ouroboros/commit/4e70b760b4eb157469b58645339ba831f6513d37",
      "source": "[email protected]"
    },
    {
      "url": "https://github.com/Q00/ouroboros/pull/1078",
      "source": "[email protected]"
    },
    {
      "url": "https://github.com/Q00/ouroboros/security/advisories/GHSA-c4m7-2gwp-vw76",
      "source": "[email protected]"
    }
  ]
}