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CVE-2026-82533

Estado: AplazadaCrítica (9.4)—

DeepSeek Harness before 0.1.2-alpha.1 contains an authentication bypass vulnerability that grants unauthenticated access to its local HTTP agent-control API by accepting a client-supplied loopback Host header in place of validating the actual TCP connection origin. On the default configuration, a confined tool-executed process can reach the loopback API without any port exposure and use it to escape its own OS sandbox, escalate to unconfined execution, and disable the approval prompt. When the port is externally reachable via tunnel, SSH forward, or reverse proxy, a remote attacker can exploit the same flaw to create sessions, execute arbitrary commands, and exfiltrate stored conversation transcripts without credentials.

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).

🎯 Técnicas ATT&CK

Cómo se explota esta vulnerabilidad y qué consigue el atacante, en el lenguaje de MITRE ATT&CK.

UI:R (interacción del usuario) y acceso remoto (AV:N) → T1203. Impactos: ejecución de comandos arbitrarios (T1059), bypass de autenticación → acceso no autorizado (T1078), acceso a transcripciones almacenadas (T1005).

Inferido por nuestro agente de análisis a partir de la descripción oficial, el vector CVSS y la CWE, y comprobado por un supervisor. Puede contener errores.

🛡️ Mitigaciones ATT&CK que cubren estas técnicas

Privileged Account ManagementApplication Developer GuidanceActive Directory ConfigurationUser TrainingUser Account ManagementRestrict Web-Based Content

Tecnologías afectadas (1)

⚠ Inferidas por IA a partir de la descripción — NVD aún no ha analizado esta CVE; no son CPE verificados.

Deepseek — HarnessAI

CWE

Referencias

JSON original (NVD)

Mostrar
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  "id": "CVE-2026-82533",
  "cveTags": [],
  "metrics": {
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          "id": "CVE-2026-82533",
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          "options": [
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              "exploitation": "none"
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              "automatable": "no"
            },
            {
              "technicalImpact": "total"
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          "version": "2.0.3",
          "timestamp": "2026-09-08T17:20:59.863077Z"
        }
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          "Automatable": "NOT_DEFINED",
          "attackVector": "NETWORK",
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          "vulnerabilityResponseEffort": "NOT_DEFINED",
          "modifiedSubAvailabilityImpact": "NOT_DEFINED",
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          "repo": "https://github.com/deepseek-ai/deepseek-harness",
          "vendor": "DeepSeek",
          "product": "DeepSeek Harness",
          "versions": [
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  "published": "2026-09-08T17:18:36.887",
  "references": [
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      "url": "https://github.com/deepseek-ai/deepseek-harness/commit/3e24087bfaeabe40b58ba2f7b936895b8f93fe27",
      "source": "disclosure@vulncheck.com"
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    },
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      "url": "https://www.ox.security/blog/cve-2026-82533-deepseek-harness-ai-agent-sandbox-escape/",
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      "url": "https://www.vulncheck.com/advisories/deepseek-harness-alpha-1-authentication-bypass-via-host-header-spoofing",
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  ],
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    {
      "lang": "en",
      "value": "DeepSeek Harness before 0.1.2-alpha.1 contains an authentication bypass vulnerability that grants unauthenticated access to its local HTTP agent-control API by accepting a client-supplied loopback Host header in place of validating the actual TCP connection origin. On the default configuration, a confined tool-executed process can reach the loopback API without any port exposure and use it to escape its own OS sandbox, escalate to unconfined execution, and disable the approval prompt. When the port is externally reachable via tunnel, SSH forward, or reverse proxy, a remote attacker can exploit the same flaw to create sessions, execute arbitrary commands, and exfiltrate stored conversation transcripts without credentials."
    }
  ],
  "lastModified": "2026-09-10T15:17:47.593",
  "sourceIdentifier": "disclosure@vulncheck.com"
}