CVE-2026-61740

{
  "id": "CVE-2026-61740",
  "sourceIdentifier": "[email protected]",
  "published": "2026-07-15T15:16:48.350",
  "lastModified": "2026-10-24T21:10:00.130",
  "vulnStatus": "Deferred",
  "cveTags": [],
  "descriptions": [
    {
      "lang": "en",
      "value": "LightRAG provides simple and fast retrieval-augmented generation. Prior to 1.5.4, when LightRAG is deployed with LIGHTRAG_API_KEY set but AUTH_ACCOUNTS unset, X-API-Key protection can be bypassed because lightrag/api/auth.py falls back to a hardcoded DEFAULT_TOKEN_SECRET, /auth-status and /login can mint guest JWTs, and combined_dependency in lightrag/api/utils_api.py accepts a valid guest token before checking the API key. A remote unauthenticated attacker can call endpoints guarded by combined_auth, including document read, upload, deletion, graph mutation, and query endpoints. This vulnerability is fixed in 1.5.4."
    },
    {
      "lang": "es",
      "value": "LightRAG proporciona generación aumentada por recuperación simple y rápida. Antes de 1.5.4, cuando LightRAG se despliega con LIGHTRAG_API_KEY configurada pero AUTH_ACCOUNTS no configurada, la protección de X-API-Key puede ser eludida porque lightrag/api/auth.py recurre a un DEFAULT_TOKEN_SECRET codificado de forma rígida, /auth-status y /login pueden emitir JWTs de invitado, y combined_dependency en lightrag/api/utils_api.py acepta un token de invitado válido antes de verificar la clave API. Un atacante remoto no autenticado puede llamar a los puntos finales protegidos por combined_auth, incluyendo lectura de documentos, carga, eliminación, mutación de grafos y puntos finales de consulta. Esta vulnerabilidad está corregida en 1.5.4."
    }
  ],
  "affected": [
    {
      "source": "[email protected]",
      "affectedData": [
        {
          "vendor": "HKUDS",
          "product": "LightRAG",
          "versions": [
            {
              "version": "< 1.5.4",
              "status": "affected"
            }
          ]
        }
      ]
    }
  ],
  "metrics": {
    "cvssMetricV40": [
      {
        "source": "[email protected]",
        "type": "Secondary",
        "cvssData": {
          "version": "4.0",
          "vectorString": "CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:H/VI:H/VA:L/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": 9.3,
          "baseSeverity": "CRITICAL",
          "attackVector": "NETWORK",
          "attackComplexity": "LOW",
          "attackRequirements": "NONE",
          "privilegesRequired": "NONE",
          "userInteraction": "NONE",
          "vulnConfidentialityImpact": "HIGH",
          "vulnIntegrityImpact": "HIGH",
          "vulnAvailabilityImpact": "LOW",
          "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": "2026-07-15T15:14:50.443978Z",
          "id": "CVE-2026-61740",
          "options": [
            {
              "exploitation": "poc"
            },
            {
              "automatable": "yes"
            },
            {
              "technicalImpact": "total"
            }
          ],
          "role": "CISA Coordinator",
          "version": "2.0.3"
        }
      }
    ]
  },
  "weaknesses": [
    {
      "source": "[email protected]",
      "type": "Secondary",
      "description": [
        {
          "lang": "en",
          "value": "CWE-287"
        },
        {
          "lang": "en",
          "value": "CWE-798"
        }
      ]
    }
  ],
  "references": [
    {
      "url": "https://github.com/HKUDS/LightRAG/commit/f7819aa3a49a9d8d92eed8251d82d6ebcafa8cba",
      "source": "[email protected]"
    },
    {
      "url": "https://github.com/HKUDS/LightRAG/pull/3319",
      "source": "[email protected]"
    },
    {
      "url": "https://github.com/HKUDS/LightRAG/releases/tag/v1.5.4",
      "source": "[email protected]"
    },
    {
      "url": "https://github.com/HKUDS/LightRAG/security/advisories/GHSA-f4vv-55c2-5789",
      "source": "[email protected]"
    },
    {
      "url": "https://github.com/HKUDS/LightRAG/security/advisories/GHSA-f4vv-55c2-5789",
      "source": "134c704f-9b21-4f2e-91b3-4a467353bcc0"
    }
  ]
}