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CVE-2026-30857

Estado: AnalizadaMedia (5.3)—

WeKnora is an LLM-powered framework designed for deep document understanding and semantic retrieval. Prior to version 0.3.0, a cross-tenant authorization bypass in the knowledge base copy endpoint allows any authenticated user to clone (duplicate) another tenant’s knowledge base into their own tenant by knowing/guessing the source knowledge base ID. This enables bulk data exfiltration (document/FAQ content) across tenants. This issue has been patched in version 0.3.0.

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).

Tecnologías afectadas (1)

Tencent — Weknora

CWE

Referencias

JSON original (NVD)

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{
  "id": "CVE-2026-30857",
  "cveTags": [],
  "metrics": {
    "ssvcV203": [
      {
        "source": "134c704f-9b21-4f2e-91b3-4a467353bcc0",
        "ssvcData": {
          "id": "CVE-2026-30857",
          "role": "CISA Coordinator",
          "options": [
            {
              "exploitation": "poc"
            },
            {
              "automatable": "no"
            },
            {
              "technicalImpact": "partial"
            }
          ],
          "version": "2.0.3",
          "timestamp": "2026-03-09T17:52:20.654301Z"
        }
      }
    ],
    "cvssMetricV31": [
      {
        "type": "Secondary",
        "source": "security-advisories@github.com",
        "cvssData": {
          "scope": "UNCHANGED",
          "version": "3.1",
          "baseScore": 5.3,
          "attackVector": "NETWORK",
          "baseSeverity": "MEDIUM",
          "vectorString": "CVSS:3.1/AV:N/AC:H/PR:L/UI:N/S:U/C:H/I:N/A:N",
          "integrityImpact": "NONE",
          "userInteraction": "NONE",
          "attackComplexity": "HIGH",
          "availabilityImpact": "NONE",
          "privilegesRequired": "LOW",
          "confidentialityImpact": "HIGH"
        },
        "impactScore": 3.6,
        "exploitabilityScore": 1.6
      }
    ]
  },
  "affected": [
    {
      "source": "security-advisories@github.com",
      "affectedData": [
        {
          "vendor": "Tencent",
          "product": "WeKnora",
          "versions": [
            {
              "status": "affected",
              "version": "< 0.3.0"
            }
          ]
        }
      ]
    }
  ],
  "published": "2026-03-07T17:15:53.370",
  "references": [
    {
      "url": "https://github.com/Tencent/WeKnora/security/advisories/GHSA-8rf9-c59g-f82f",
      "tags": [
        "Exploit",
        "Vendor Advisory"
      ],
      "source": "security-advisories@github.com"
    }
  ],
  "vulnStatus": "Analyzed",
  "weaknesses": [
    {
      "type": "Secondary",
      "source": "security-advisories@github.com",
      "description": [
        {
          "lang": "en",
          "value": "CWE-639"
        }
      ]
    }
  ],
  "descriptions": [
    {
      "lang": "en",
      "value": "WeKnora is an LLM-powered framework designed for deep document understanding and semantic retrieval. Prior to version 0.3.0, a cross-tenant authorization bypass in the knowledge base copy endpoint allows any authenticated user to clone (duplicate) another tenant’s knowledge base into their own tenant by knowing/guessing the source knowledge base ID. This enables bulk data exfiltration (document/FAQ content) across tenants. This issue has been patched in version 0.3.0."
    },
    {
      "lang": "es",
      "value": "WeKnora es un framework impulsado por LLM diseñado para la comprensión profunda de documentos y la recuperación semántica. Antes de la versión 0.3.0, una omisión de autorización entre inquilinos en el endpoint de copia de la base de conocimiento permite a cualquier usuario autenticado clonar (duplicar) la base de conocimiento de otro inquilino en su propio inquilino conociendo/adivinando el ID de la base de conocimiento de origen. Esto permite la exfiltración masiva de datos (contenido de documentos/preguntas frecuentes) entre inquilinos. Este problema ha sido parcheado en la versión 0.3.0."
    }
  ],
  "lastModified": "2026-06-17T10:33:02.683",
  "configurations": [
    {
      "nodes": [
        {
          "negate": false,
          "cpeMatch": [
            {
              "criteria": "cpe:2.3:a:tencent:weknora:*:*:*:*:*:*:*:*",
              "vulnerable": true,
              "matchCriteriaId": "7F3180E7-F262-4100-96C2-4AB5730E75FF",
              "versionEndExcluding": "0.3.0"
            }
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          "operator": "OR"
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  "sourceIdentifier": "security-advisories@github.com"
}