CVE-2026-39885

{"id": "CVE-2026-39885", "cveTags": [], "metrics": {"cvssMetricV31": [{"type": "Secondary", "source": "security-advisories@github.com", "cvssData": {"scope": "UNCHANGED", "version": "3.1", "baseScore": 7.5, "attackVector": "NETWORK", "baseSeverity": "HIGH", "vectorString": "CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:N/A:N", "integrityImpact": "NONE", "userInteraction": "NONE", "attackComplexity": "LOW", "availabilityImpact": "NONE", "privilegesRequired": "NONE", "confidentialityImpact": "HIGH"}, "impactScore": 3.6, "exploitabilityScore": 3.9}]}, "published": "2026-04-08T21:17:00.833", "references": [{"url": "https://github.com/agentfront/frontmcp/releases/tag/v1.0.4", "tags": ["Product"], "source": "security-advisories@github.com"}, {"url": "https://github.com/agentfront/frontmcp/security/advisories/GHSA-v6ph-xcq9-qxxj", "tags": ["Exploit", "Vendor Advisory"], "source": "security-advisories@github.com"}, {"url": "https://github.com/agentfront/frontmcp/security/advisories/GHSA-v6ph-xcq9-qxxj", "tags": ["Exploit", "Vendor Advisory"], "source": "134c704f-9b21-4f2e-91b3-4a467353bcc0"}], "vulnStatus": "Analyzed", "weaknesses": [{"type": "Secondary", "source": "security-advisories@github.com", "description": [{"lang": "en", "value": "CWE-918"}]}], "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."}], "lastModified": "2026-04-15T19:04:51.807", "configurations": [{"nodes": [{"negate": false, "cpeMatch": [{"criteria": "cpe:2.3:a:agentfront:\\@frontmcp\\/adapters:*:*:*:*:*:node.js:*:*", "vulnerable": true, "matchCriteriaId": "D4359FEB-443B-4810-836F-17CF222E59A5", "versionEndExcluding": "1.0.4"}, {"criteria": "cpe:2.3:a:agentfront:\\@frontmcp\\/sdk:*:*:*:*:*:node.js:*:*", "vulnerable": true, "matchCriteriaId": "944403B2-61F9-49E2-8E1D-E8A34313DCEA", "versionEndExcluding": "1.0.4"}, {"criteria": "cpe:2.3:a:agentfront:frontmcp:*:*:*:*:*:node.js:*:*", "vulnerable": true, "matchCriteriaId": "1A711248-2B16-4ECA-878A-5CEA5274AB98", "versionEndExcluding": "1.0.4"}, {"criteria": "cpe:2.3:a:frontmcp:mcp-from-openapi:*:*:*:*:*:node.js:*:*", "vulnerable": true, "matchCriteriaId": "FA827C0B-761C-4BC3-B9BD-E06918698B32", "versionEndExcluding": "2.3.0"}], "operator": "OR"}]}], "sourceIdentifier": "security-advisories@github.com"}