{"dataType": "CVE_RECORD", "dataVersion": "5.2", "cveMetadata": {"cveId": "CVE-2026-71424", "assignerOrgId": "a0819718-46f1-4df5-94e2-005712e83aaa", "state": "PUBLISHED", "assignerShortName": "GitHub_M", "dateReserved": "2026-08-06T16:28:51.182Z", "datePublished": "2026-08-17T21:28:32.814Z", "dateUpdated": "2026-08-17T21:28:32.814Z"}, "containers": {"cna": {"title": "Onyx: Cross-user OAuth-token leak via /api/mcp/servers* for per-user MCP servers", "problemTypes": [{"descriptions": [{"cweId": "CWE-200", "lang": "en", "description": "CWE-200: Exposure of Sensitive Information to an Unauthorized Actor", "type": "CWE"}]}, {"descriptions": [{"cweId": "CWE-863", "lang": "en", "description": "CWE-863: Incorrect Authorization", "type": "CWE"}]}], "metrics": [{"cvssV3_1": {"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"}}], "references": [{"name": "https://github.com/onyx-dot-app/onyx/security/advisories/GHSA-q62f-rv3h-f822", "tags": ["x_refsource_CONFIRM"], "url": "https://github.com/onyx-dot-app/onyx/security/advisories/GHSA-q62f-rv3h-f822"}, {"name": "https://github.com/onyx-dot-app/onyx/pull/11238", "tags": ["x_refsource_MISC"], "url": "https://github.com/onyx-dot-app/onyx/pull/11238"}, {"name": "https://github.com/onyx-dot-app/onyx/pull/11242", "tags": ["x_refsource_MISC"], "url": "https://github.com/onyx-dot-app/onyx/pull/11242"}, {"name": "https://github.com/onyx-dot-app/onyx/pull/11243", "tags": ["x_refsource_MISC"], "url": "https://github.com/onyx-dot-app/onyx/pull/11243"}, {"name": "https://github.com/onyx-dot-app/onyx/commit/3f3d79d1a7722fdc84a1c61c8aa830d890017e9e", "tags": ["x_refsource_MISC"], "url": "https://github.com/onyx-dot-app/onyx/commit/3f3d79d1a7722fdc84a1c61c8aa830d890017e9e"}, {"name": "https://github.com/onyx-dot-app/onyx/commit/4001cedd0a8968723bfe95dd188914ed56777910", "tags": ["x_refsource_MISC"], "url": "https://github.com/onyx-dot-app/onyx/commit/4001cedd0a8968723bfe95dd188914ed56777910"}, {"name": "https://github.com/onyx-dot-app/onyx/commit/b103937888fd5008067c2bb6eb6e5424576394f2", "tags": ["x_refsource_MISC"], "url": "https://github.com/onyx-dot-app/onyx/commit/b103937888fd5008067c2bb6eb6e5424576394f2"}, {"name": "https://github.com/onyx-dot-app/onyx/releases/tag/v4.0.0", "tags": ["x_refsource_MISC"], "url": "https://github.com/onyx-dot-app/onyx/releases/tag/v4.0.0"}], "affected": [{"vendor": "onyx-dot-app", "product": "onyx", "versions": [{"version": "< 3.1.10", "status": "affected"}, {"version": ">= 3.2.0, < 3.2.14", "status": "affected"}, {"version": ">= 3.3.0-beta.0, < 4.0.0", "status": "affected"}]}], "providerMetadata": {"orgId": "a0819718-46f1-4df5-94e2-005712e83aaa", "shortName": "GitHub_M", "dateUpdated": "2026-08-17T21:28:32.814Z"}, "descriptions": [{"lang": "en", "value": "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."}], "source": {"advisory": "GHSA-q62f-rv3h-f822", "discovery": "UNKNOWN"}}}}

{}

{"affected": [{"affectedData": [{"product": "onyx", "vendor": "onyx-dot-app", "versions": [{"status": "affected", "version": "< 3.1.10"}, {"status": "affected", "version": ">= 3.2.0, < 3.2.14"}, {"status": "affected", "version": ">= 3.3.0-beta.0, < 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'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."}], "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"}]}

{}

{}