FKIE_CVE-2026-71424

Vulnerability from fkie_nvd - Published: 2026-08-17 22:17 - Updated: 2026-08-17 22:17
Severity
9.6 (Critical) - CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:C/C:H/I:H/A:N
Summary
Onyx is an open-source AI platform. Prior to 3.1.10, 3.2.14, and 4.0.0, Onyx's GET /api/mcp/servers and GET /api/mcp/servers/persona/{persona_id} endpoints expose another user's OAuth Authorization header because OnyxTokenStorage.set_tokens and OnyxTokenStorage.set_client_info in backend/onyx/server/features/mcp/api.py copy per-user tokens into a shared admin MCPConnectionConfig row and _db_mcp_server_to_api_mcp_server returns that row through auth_template.headers to any BASIC_ACCESS user. This issue is fixed in versions 3.1.10, 3.2.14, and 4.0.0.
References
security-advisories@github.comhttps://github.com/onyx-dot-app/onyx/commit/3f3d79d1a7722fdc84a1c61c8aa830d890017e9e
security-advisories@github.comhttps://github.com/onyx-dot-app/onyx/commit/4001cedd0a8968723bfe95dd188914ed56777910
security-advisories@github.comhttps://github.com/onyx-dot-app/onyx/commit/b103937888fd5008067c2bb6eb6e5424576394f2
security-advisories@github.comhttps://github.com/onyx-dot-app/onyx/pull/11238
security-advisories@github.comhttps://github.com/onyx-dot-app/onyx/pull/11242
security-advisories@github.comhttps://github.com/onyx-dot-app/onyx/pull/11243
security-advisories@github.comhttps://github.com/onyx-dot-app/onyx/releases/tag/v4.0.0
security-advisories@github.comhttps://github.com/onyx-dot-app/onyx/security/advisories/GHSA-q62f-rv3h-f822
Impacted products
Vendor Product Version
To clipboard 

{
  "affected": [
    {
      "affectedData": [
        {
          "product": "onyx",
          "vendor": "onyx-dot-app",
          "versions": [
            {
              "status": "affected",
              "version": "\u003c 3.1.10"
            },
            {
              "status": "affected",
              "version": "\u003e= 3.2.0, \u003c 3.2.14"
            },
            {
              "status": "affected",
              "version": "\u003e= 3.3.0-beta.0, \u003c 4.0.0"
            }
          ]
        }
      ],
      "source": "security-advisories@github.com"
    }
  ],
  "cveTags": [],
  "descriptions": [
    {
      "lang": "en",
      "value": "Onyx is an open-source AI platform. Prior to 3.1.10, 3.2.14, and 4.0.0, Onyx\u0027s GET /api/mcp/servers and GET /api/mcp/servers/persona/{persona_id} endpoints expose another user\u0027s OAuth Authorization header because OnyxTokenStorage.set_tokens and OnyxTokenStorage.set_client_info in backend/onyx/server/features/mcp/api.py copy per-user tokens into a shared admin MCPConnectionConfig row and _db_mcp_server_to_api_mcp_server returns that row through auth_template.headers to any BASIC_ACCESS user. This issue is fixed in versions 3.1.10, 3.2.14, and 4.0.0."
    }
  ],
  "id": "CVE-2026-71424",
  "lastModified": "2026-08-17T22:17:26.527",
  "metrics": {
    "cvssMetricV31": [
      {
        "cvssData": {
          "attackComplexity": "LOW",
          "attackVector": "NETWORK",
          "availabilityImpact": "NONE",
          "baseScore": 9.6,
          "baseSeverity": "CRITICAL",
          "confidentialityImpact": "HIGH",
          "integrityImpact": "HIGH",
          "privilegesRequired": "LOW",
          "scope": "CHANGED",
          "userInteraction": "NONE",
          "vectorString": "CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:C/C:H/I:H/A:N",
          "version": "3.1"
        },
        "exploitabilityScore": 3.1,
        "impactScore": 5.8,
        "source": "security-advisories@github.com",
        "type": "Secondary"
      }
    ]
  },
  "published": "2026-08-17T22:17:26.527",
  "references": [
    {
      "source": "security-advisories@github.com",
      "url": "https://github.com/onyx-dot-app/onyx/commit/3f3d79d1a7722fdc84a1c61c8aa830d890017e9e"
    },
    {
      "source": "security-advisories@github.com",
      "url": "https://github.com/onyx-dot-app/onyx/commit/4001cedd0a8968723bfe95dd188914ed56777910"
    },
    {
      "source": "security-advisories@github.com",
      "url": "https://github.com/onyx-dot-app/onyx/commit/b103937888fd5008067c2bb6eb6e5424576394f2"
    },
    {
      "source": "security-advisories@github.com",
      "url": "https://github.com/onyx-dot-app/onyx/pull/11238"
    },
    {
      "source": "security-advisories@github.com",
      "url": "https://github.com/onyx-dot-app/onyx/pull/11242"
    },
    {
      "source": "security-advisories@github.com",
      "url": "https://github.com/onyx-dot-app/onyx/pull/11243"
    },
    {
      "source": "security-advisories@github.com",
      "url": "https://github.com/onyx-dot-app/onyx/releases/tag/v4.0.0"
    },
    {
      "source": "security-advisories@github.com",
      "url": "https://github.com/onyx-dot-app/onyx/security/advisories/GHSA-q62f-rv3h-f822"
    }
  ],
  "sourceIdentifier": "security-advisories@github.com",
  "vulnStatus": "Received",
  "weaknesses": [
    {
      "description": [
        {
          "lang": "en",
          "value": "CWE-200"
        },
        {
          "lang": "en",
          "value": "CWE-863"
        }
      ],
      "source": "security-advisories@github.com",
      "type": "Primary"
    }
  ]
}



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