{"dataType": "CVE_RECORD", "dataVersion": "5.2", "cveMetadata": {"cveId": "CVE-2026-67531", "assignerOrgId": "a0819718-46f1-4df5-94e2-005712e83aaa", "state": "PUBLISHED", "assignerShortName": "GitHub_M", "dateReserved": "2026-07-29T18:47:17.073Z", "datePublished": "2026-08-05T22:54:36.219Z", "dateUpdated": "2026-08-05T22:54:36.219Z"}, "containers": {"cna": {"title": "FrontMCP: CodeCall sandbox escape -> host RCE via live Zod schema exposure by getTool", "problemTypes": [{"descriptions": [{"cweId": "CWE-94", "lang": "en", "description": "CWE-94: Improper Control of Generation of Code ('Code Injection')", "type": "CWE"}]}], "metrics": [{"cvssV4_0": {"attackVector": "NETWORK", "attackComplexity": "LOW", "attackRequirements": "NONE", "privilegesRequired": "NONE", "userInteraction": "NONE", "vulnConfidentialityImpact": "HIGH", "vulnIntegrityImpact": "HIGH", "vulnAvailabilityImpact": "HIGH", "subConfidentialityImpact": "NONE", "subIntegrityImpact": "NONE", "subAvailabilityImpact": "NONE", "baseScore": 9.3, "baseSeverity": "CRITICAL", "vectorString": "CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:H/VI:H/VA:H/SC:N/SI:N/SA:N", "version": "4.0"}}], "references": [{"name": "https://github.com/agentfront/frontmcp/security/advisories/GHSA-mp29-fxh8-92px", "tags": ["x_refsource_CONFIRM"], "url": "https://github.com/agentfront/frontmcp/security/advisories/GHSA-mp29-fxh8-92px"}, {"name": "https://github.com/agentfront/frontmcp/commit/209cddd19a8d4db0777f725b527818da7df6f67f", "tags": ["x_refsource_MISC"], "url": "https://github.com/agentfront/frontmcp/commit/209cddd19a8d4db0777f725b527818da7df6f67f"}], "affected": [{"vendor": "agentfront", "product": "frontmcp", "versions": [{"version": "< 1.5.7", "status": "affected"}]}], "providerMetadata": {"orgId": "a0819718-46f1-4df5-94e2-005712e83aaa", "shortName": "GitHub_M", "dateUpdated": "2026-08-05T22:54:36.219Z"}, "descriptions": [{"lang": "en", "value": "FrontMCP is a TypeScript-first framework for the Model Context Protocol (MCP). Prior to 1.5.7, the sandboxed codecall:execute\u00a0tool exposes live host Zod\u00a0schema instances to the script via\u00a0getTool(), and because Zod v4 defines\u00a0_zod as a non-configurable, non-writable own property, the ECMAScript Proxy invariants force the security membrane to hand back the raw host object, letting a script reach\u00a0_zod.constr.constructor\u00a0(the host Function\u00a0constructor) and execute arbitrary code in the server process. A single tools/call is sufficient to escape the sandbox and achieve remote code execution as the server user, exposing everything the process holds such as OAuth client secrets, JWT_SECRET, session keys, database credentials, and cloud instance metadata. Because the framework's\u00a0DEFAULT_AUTH_OPTIONS\u00a0is public mode, an unconfigured server serves this to unauthenticated callers, and on authenticated servers an indirect prompt injection in tool output or fetched content can trigger it without a human attackerThis issue is fixed in version 1.5.7."}], "source": {"advisory": "GHSA-mp29-fxh8-92px", "discovery": "UNKNOWN"}}}}

{}

{}

{}

{"affected": [{"configurations": [{"platform": null, "status": "affected", "versions": {"scheme": "semver", "value": "[0,1.5.7)"}}], "enrichment": {"confidence": 100.0, "confidence_source": "matching", "scores": [{"score": 100.0, "source": "matching"}]}, "original": {"product": "frontmcp", "source": "cna", "vendor": "agentfront"}, "product": "frontmcp", "vendor": "agentfront"}], "created": "2026-08-06T00:30:03.835198+00:00", "updated": "2026-08-06T00:30:03.927417+00:00", "vendors": ["agentfront", "agentfront$PRODUCT$frontmcp"]}