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CVE-2026-93839

Estado: Pendiente de análisisCrítica (9.3)—

LightLLM through 1.2.0 contains an authentication bypass vulnerability in the /pd_register WebSocket endpoint that allows unauthenticated attackers to register arbitrary nodes by supplying crafted JSON without peer address validation. Attackers can disclose full user prompts routed to their socket, trigger denial of service by replacing legitimate nodes, or make the PD Master issue requests to internal network addresses.

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.

Vulnerabilidad de autenticación en endpoint WebSocket expuesto sin validación (AV:N, PR:N, UI:N) permite registro no autorizado de nodos. Impacto: acceso no autorizado (T1078), denegación de servicio (T1499) y solicitudes SSRF a red interna (T1090).

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

Filter Network TrafficPrivileged Account ManagementApplication Developer GuidanceActive Directory ConfigurationVulnerability ScanningUser Training

Tecnologías afectadas (1)

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

Lightllm — LightllmAI

CWE

Referencias

JSON original (NVD)

Mostrar
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  "id": "CVE-2026-93839",
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          "id": "CVE-2026-93839",
          "role": "CISA Coordinator",
          "options": [
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              "automatable": "yes"
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          "version": "2.0.3",
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          "modifiedVulnIntegrityImpact": "NOT_DEFINED",
          "vulnerabilityResponseEffort": "NOT_DEFINED",
          "modifiedSubAvailabilityImpact": "NOT_DEFINED",
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          "modifiedVulnConfidentialityImpact": "NOT_DEFINED"
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      "url": "https://github.com/ModelTC/LightLLM/issues/1576",
      "source": "disclosure@vulncheck.com"
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      "url": "https://github.com/ModelTC/lightllm/blob/v1.2.0/lightllm/server/api_http.py#L198-L205",
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      "description": [
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          "lang": "en",
          "value": "CWE-306"
        }
      ]
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  ],
  "descriptions": [
    {
      "lang": "en",
      "value": "LightLLM through 1.2.0 contains an authentication bypass vulnerability in the /pd_register WebSocket endpoint that allows unauthenticated attackers to register arbitrary nodes by supplying crafted JSON without peer address validation. Attackers can disclose full user prompts routed to their socket, trigger denial of service by replacing legitimate nodes, or make the PD Master issue requests to internal network addresses."
    }
  ],
  "lastModified": "2026-09-22T20:55:25.800",
  "sourceIdentifier": "disclosure@vulncheck.com"
}