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FKIE_CVE-2026-84377

Vulnerability from fkie_nvd - Published: 2026-09-02 18:21 - Updated: 2026-09-03 15:17
Severity
6.5 (Medium) - CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:N/A:N
Summary
LiteLLM is a proxy server (AI Gateway) to call LLM APIs in OpenAI (or native) format. Prior to versions 1.88.6 and 1.96.2, any authenticated LiteLLM proxy user could redirect an outbound provider call to a destination the user controls and cause the proxy to send its configured provider credentials to that destination. Request validation in litellm/proxy/auth/auth_utils.py, litellm/proxy/common_request_processing.py, litellm/proxy/health_endpoints/_health_endpoints.py, litellm/proxy/image_endpoints/endpoints.py, and litellm/proxy/litellm_pre_call_utils.py used incomplete checks that did not cover every sensitive parameter or inspect equivalent values across nested request fields, path values, and bracket-notation form data. Routing and credential parameters including api_base, base_url, model_list, fallbacks, and litellm_credential_name could therefore be applied without clearing the operator's stored key, exposing upstream provider credentials and other configured secrets and permitting server-side requests to internal services reachable by the proxy. This issue is fixed in versions 1.88.6 and 1.96.2.
References
security-advisories@github.comhttps://github.com/BerriAI/litellm/commit/473f72e63a9777d793fbbf57194d8ec4fb97bc1b
security-advisories@github.comhttps://github.com/BerriAI/litellm/commit/820f247a6abba55cd87d130bef7bba7be3b29d37
security-advisories@github.comhttps://github.com/BerriAI/litellm/commit/c898d341c02299cf2506d0d8e84cc67953043593
security-advisories@github.comhttps://github.com/BerriAI/litellm/pull/36011
security-advisories@github.comhttps://github.com/BerriAI/litellm/pull/36314
security-advisories@github.comhttps://github.com/BerriAI/litellm/pull/36494
security-advisories@github.comhttps://github.com/BerriAI/litellm/releases/tag/v1.88.6
security-advisories@github.comhttps://github.com/BerriAI/litellm/releases/tag/v1.96.2
security-advisories@github.comhttps://github.com/BerriAI/litellm/security/advisories/GHSA-3cv6-jpf6-8222
Impacted products
Vendor Product Version
To clipboard 

{
  "affected": [
    {
      "affectedData": [
        {
          "product": "litellm",
          "vendor": "BerriAI",
          "versions": [
            {
              "status": "affected",
              "version": "\u003c 1.88.6"
            },
            {
              "status": "affected",
              "version": "\u003e= 1.89.0, \u003c 1.96.2"
            }
          ]
        }
      ],
      "source": "security-advisories@github.com"
    }
  ],
  "cveTags": [],
  "descriptions": [
    {
      "lang": "en",
      "value": "LiteLLM is a proxy server (AI Gateway) to call LLM APIs in OpenAI (or native) format. Prior to versions 1.88.6 and 1.96.2, any authenticated LiteLLM proxy user could redirect an outbound provider call to a destination the user controls and cause the proxy to send its configured provider credentials to that destination. Request validation in litellm/proxy/auth/auth_utils.py, litellm/proxy/common_request_processing.py, litellm/proxy/health_endpoints/_health_endpoints.py, litellm/proxy/image_endpoints/endpoints.py, and litellm/proxy/litellm_pre_call_utils.py used incomplete checks that did not cover every sensitive parameter or inspect equivalent values across nested request fields, path values, and bracket-notation form data. Routing and credential parameters including api_base, base_url, model_list, fallbacks, and litellm_credential_name could therefore be applied without clearing the operator\u0027s stored key, exposing upstream provider credentials and other configured secrets and permitting server-side requests to internal services reachable by the proxy. This issue is fixed in versions 1.88.6 and 1.96.2."
    }
  ],
  "id": "CVE-2026-84377",
  "lastModified": "2026-09-03T15:17:35.120",
  "metrics": {
    "cvssMetricV31": [
      {
        "cvssData": {
          "attackComplexity": "LOW",
          "attackVector": "NETWORK",
          "availabilityImpact": "NONE",
          "baseScore": 6.5,
          "baseSeverity": "MEDIUM",
          "confidentialityImpact": "HIGH",
          "integrityImpact": "NONE",
          "privilegesRequired": "LOW",
          "scope": "UNCHANGED",
          "userInteraction": "NONE",
          "vectorString": "CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:N/A:N",
          "version": "3.1"
        },
        "exploitabilityScore": 2.8,
        "impactScore": 3.6,
        "source": "security-advisories@github.com",
        "type": "Secondary"
      }
    ],
    "ssvcV203": [
      {
        "source": "134c704f-9b21-4f2e-91b3-4a467353bcc0",
        "ssvcData": {
          "id": "CVE-2026-84377",
          "options": [
            {
              "exploitation": "none"
            },
            {
              "automatable": "no"
            },
            {
              "technicalImpact": "partial"
            }
          ],
          "role": "CISA Coordinator",
          "timestamp": "2026-09-03T14:06:05.318151Z",
          "version": "2.0.3"
        }
      }
    ]
  },
  "published": "2026-09-02T18:21:28.997",
  "references": [
    {
      "source": "security-advisories@github.com",
      "url": "https://github.com/BerriAI/litellm/commit/473f72e63a9777d793fbbf57194d8ec4fb97bc1b"
    },
    {
      "source": "security-advisories@github.com",
      "url": "https://github.com/BerriAI/litellm/commit/820f247a6abba55cd87d130bef7bba7be3b29d37"
    },
    {
      "source": "security-advisories@github.com",
      "url": "https://github.com/BerriAI/litellm/commit/c898d341c02299cf2506d0d8e84cc67953043593"
    },
    {
      "source": "security-advisories@github.com",
      "url": "https://github.com/BerriAI/litellm/pull/36011"
    },
    {
      "source": "security-advisories@github.com",
      "url": "https://github.com/BerriAI/litellm/pull/36314"
    },
    {
      "source": "security-advisories@github.com",
      "url": "https://github.com/BerriAI/litellm/pull/36494"
    },
    {
      "source": "security-advisories@github.com",
      "url": "https://github.com/BerriAI/litellm/releases/tag/v1.88.6"
    },
    {
      "source": "security-advisories@github.com",
      "url": "https://github.com/BerriAI/litellm/releases/tag/v1.96.2"
    },
    {
      "source": "security-advisories@github.com",
      "url": "https://github.com/BerriAI/litellm/security/advisories/GHSA-3cv6-jpf6-8222"
    }
  ],
  "sourceIdentifier": "security-advisories@github.com",
  "vulnStatus": "Received",
  "weaknesses": [
    {
      "description": [
        {
          "lang": "en",
          "value": "CWE-918"
        }
      ],
      "source": "security-advisories@github.com",
      "type": "Secondary"
    }
  ]
}



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