{"dataType": "CVE_RECORD", "dataVersion": "5.2", "cveMetadata": {"cveId": "CVE-2026-39885", "assignerOrgId": "a0819718-46f1-4df5-94e2-005712e83aaa", "state": "PUBLISHED", "assignerShortName": "GitHub_M", "dateReserved": "2026-04-07T20:32:03.010Z", "datePublished": "2026-04-08T20:34:20.538Z", "dateUpdated": "2026-04-08T20:34:20.538Z"}, "containers": {"cna": {"title": "FrontMCP Affected by SSRF via $ref Dereferencing in Untrusted OpenAPI Specifications", "problemTypes": [{"descriptions": [{"cweId": "CWE-918", "lang": "en", "description": "CWE-918: Server-Side Request Forgery (SSRF)", "type": "CWE"}]}], "metrics": [{"cvssV3_1": {"attackComplexity": "LOW", "attackVector": "NETWORK", "availabilityImpact": "NONE", "baseScore": 7.5, "baseSeverity": "HIGH", "confidentialityImpact": "HIGH", "integrityImpact": "NONE", "privilegesRequired": "NONE", "scope": "UNCHANGED", "userInteraction": "NONE", "vectorString": "CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:N/A:N", "version": "3.1"}}], "references": [{"name": "https://github.com/agentfront/frontmcp/security/advisories/GHSA-v6ph-xcq9-qxxj", "tags": ["x_refsource_CONFIRM"], "url": "https://github.com/agentfront/frontmcp/security/advisories/GHSA-v6ph-xcq9-qxxj"}, {"name": "https://github.com/agentfront/frontmcp/releases/tag/v1.0.4", "tags": ["x_refsource_MISC"], "url": "https://github.com/agentfront/frontmcp/releases/tag/v1.0.4"}], "affected": [{"vendor": "agentfront", "product": "frontmcp", "versions": [{"version": "< 1.0.4", "status": "affected"}]}, {"vendor": "@frontmcp", "product": "adapters", "versions": [{"version": "< 1.0.4", "status": "affected"}]}, {"vendor": "@frontmcp", "product": "sdk", "versions": [{"version": "< 1.0.4", "status": "affected"}]}, {"vendor": "frontmcp", "product": "mcp-from-openapi", "versions": [{"version": "< 2.3.0", "status": "affected"}]}], "providerMetadata": {"orgId": "a0819718-46f1-4df5-94e2-005712e83aaa", "shortName": "GitHub_M", "dateUpdated": "2026-04-08T20:34:20.538Z"}, "descriptions": [{"lang": "en", "value": "FrontMCP is a TypeScript-first framework for the Model Context Protocol (MCP). Prior to 2.3.0, the mcp-from-openapi library uses @apidevtools/json-schema-ref-parser to dereference $ref pointers in OpenAPI specifications without configuring any URL restrictions or custom resolvers. A malicious OpenAPI specification containing $ref values pointing to internal network addresses, cloud metadata endpoints, or local files will cause the library to fetch those resources during the initialize() call. This enables Server-Side Request Forgery (SSRF) and local file read attacks when processing untrusted OpenAPI specifications. This vulnerability is fixed in 2.3.0."}], "source": {"advisory": "GHSA-v6ph-xcq9-qxxj", "discovery": "UNKNOWN"}}}}

{}

{"cveTags": [], "descriptions": [{"lang": "en", "value": "FrontMCP is a TypeScript-first framework for the Model Context Protocol (MCP). Prior to 2.3.0, the mcp-from-openapi library uses @apidevtools/json-schema-ref-parser to dereference $ref pointers in OpenAPI specifications without configuring any URL restrictions or custom resolvers. A malicious OpenAPI specification containing $ref values pointing to internal network addresses, cloud metadata endpoints, or local files will cause the library to fetch those resources during the initialize() call. This enables Server-Side Request Forgery (SSRF) and local file read attacks when processing untrusted OpenAPI specifications. This vulnerability is fixed in 2.3.0."}], "id": "CVE-2026-39885", "lastModified": "2026-04-08T21:26:13.410", "metrics": {"cvssMetricV31": [{"cvssData": {"attackComplexity": "LOW", "attackVector": "NETWORK", "availabilityImpact": "NONE", "baseScore": 7.5, "baseSeverity": "HIGH", "confidentialityImpact": "HIGH", "integrityImpact": "NONE", "privilegesRequired": "NONE", "scope": "UNCHANGED", "userInteraction": "NONE", "vectorString": "CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:N/A:N", "version": "3.1"}, "exploitabilityScore": 3.9, "impactScore": 3.6, "source": "security-advisories@github.com", "type": "Secondary"}]}, "published": "2026-04-08T21:17:00.833", "references": [{"source": "security-advisories@github.com", "url": "https://github.com/agentfront/frontmcp/releases/tag/v1.0.4"}, {"source": "security-advisories@github.com", "url": "https://github.com/agentfront/frontmcp/security/advisories/GHSA-v6ph-xcq9-qxxj"}], "sourceIdentifier": "security-advisories@github.com", "vulnStatus": "Awaiting Analysis", "weaknesses": [{"description": [{"lang": "en", "value": "CWE-918"}], "source": "security-advisories@github.com", "type": "Primary"}]}

{}

{}