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CVE-2020-26217

Estado: AnalizadaAlta (8.8)—💥 Exploit

XStream before version 1.4.14 is vulnerable to Remote Code Execution.The vulnerability may allow a remote attacker to run arbitrary shell commands only by manipulating the processed input stream. Only users who rely on blocklists are affected. Anyone using XStream's Security Framework allowlist is not affected. The linked advisory provides code workarounds for users who cannot upgrade. The issue is fixed in version 1.4.14.

CVSS

Probabilidad de explotación (EPSS)

EPSS (Exploit Prediction Scoring System, de FIRST) estima la probabilidad de que una vulnerabilidad sea explotada en 30 días. Complementa a CVSS (impacto) y a CISA KEV (explotación confirmada).

💥 Exploits públicos

Hay código de explotación o plantillas de detección públicos. No es lo mismo que explotación activa confirmada (KEV), pero aumenta el riesgo: parchee con prioridad.

⚠️ Las pruebas de concepto de GitHub no están verificadas: algunas son falsas o contienen malware. No las ejecute nunca fuera de un laboratorio aislado.

Tecnologías afectadas (15)

CWE

Referencias

JSON original (NVD)

Mostrar
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  "id": "CVE-2020-26217",
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      "value": "XStream before version 1.4.14 is vulnerable to Remote Code Execution.The vulnerability may allow a remote attacker to run arbitrary shell commands only by manipulating the processed input stream. Only users who rely on blocklists are affected. Anyone using XStream's Security Framework allowlist is not affected. The linked advisory provides code workarounds for users who cannot upgrade. The issue is fixed in version 1.4.14."
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      "value": "XStream anterior a versión 1.4.14, es vulnerable a una ejecución de código remota. La vulnerabilidad puede permitir a un atacante remoto ejecutar comandos de shell arbitrarios solo manipulando el flujo de entrada procesado.&#xa0;Solo los usuarios que dependen de las listas de bloqueo están afectados.&#xa0;Cualquiera que utilice la lista de permitidos del Security Framework de XStream no estará afectado.&#xa0;El aviso vinculado proporciona soluciones de código para usuarios que no pueden actualizar.&#xa0;El problema se corrigió en la versión 1.4.14"
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  "lastModified": "2026-06-17T03:07:50.633",
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  "sourceIdentifier": "security-advisories@github.com"
}