CVE-2026-39911

{"id": "CVE-2026-39911", "cveTags": [], "metrics": {"ssvcV203": [{"source": "134c704f-9b21-4f2e-91b3-4a467353bcc0", "ssvcData": {"id": "CVE-2026-39911", "role": "CISA Coordinator", "options": [{"exploitation": "none"}, {"automatable": "no"}, {"technicalImpact": "total"}], "version": "2.0.3", "timestamp": "2026-04-09T18:15:34.979616Z"}}], "cvssMetricV31": [{"type": "Secondary", "source": "disclosure@vulncheck.com", "cvssData": {"scope": "UNCHANGED", "version": "3.1", "baseScore": 8.8, "attackVector": "NETWORK", "baseSeverity": "HIGH", "vectorString": "CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H", "integrityImpact": "HIGH", "userInteraction": "NONE", "attackComplexity": "LOW", "availabilityImpact": "HIGH", "privilegesRequired": "LOW", "confidentialityImpact": "HIGH"}, "impactScore": 5.9, "exploitabilityScore": 2.8}], "cvssMetricV40": [{"type": "Secondary", "source": "disclosure@vulncheck.com", "cvssData": {"Safety": "NOT_DEFINED", "version": "4.0", "Recovery": "NOT_DEFINED", "baseScore": 8.7, "Automatable": "NOT_DEFINED", "attackVector": "NETWORK", "baseSeverity": "HIGH", "valueDensity": "NOT_DEFINED", "vectorString": "CVSS:4.0/AV:N/AC:L/AT:N/PR:L/UI:N/VC:H/VI:H/VA:H/SC:N/SI:N/SA:N/E:X/CR:X/IR:X/AR:X/MAV:X/MAC:X/MAT:X/MPR:X/MUI:X/MVC:X/MVI:X/MVA:X/MSC:X/MSI:X/MSA:X/S:X/AU:X/R:X/V:X/RE:X/U:X", "exploitMaturity": "NOT_DEFINED", "providerUrgency": "NOT_DEFINED", "userInteraction": "NONE", "attackComplexity": "LOW", "attackRequirements": "NONE", "privilegesRequired": "LOW", "subIntegrityImpact": "NONE", "vulnIntegrityImpact": "HIGH", "integrityRequirement": "NOT_DEFINED", "modifiedAttackVector": "NOT_DEFINED", "subAvailabilityImpact": "NONE", "vulnAvailabilityImpact": "HIGH", "availabilityRequirement": "NOT_DEFINED", "modifiedUserInteraction": "NOT_DEFINED", "modifiedAttackComplexity": "NOT_DEFINED", "subConfidentialityImpact": "NONE", "vulnConfidentialityImpact": "HIGH", "confidentialityRequirement": "NOT_DEFINED", "modifiedAttackRequirements": "NOT_DEFINED", "modifiedPrivilegesRequired": "NOT_DEFINED", "modifiedSubIntegrityImpact": "NOT_DEFINED", "modifiedVulnIntegrityImpact": "NOT_DEFINED", "vulnerabilityResponseEffort": "NOT_DEFINED", "modifiedSubAvailabilityImpact": "NOT_DEFINED", "modifiedVulnAvailabilityImpact": "NOT_DEFINED", "modifiedSubConfidentialityImpact": "NOT_DEFINED", "modifiedVulnConfidentialityImpact": "NOT_DEFINED"}}]}, "affected": [{"source": "disclosure@vulncheck.com", "affectedData": [{"repo": "https://github.com/hashgraph/guardian", "vendor": "hashgraph", "product": "guardian", "versions": [{"status": "affected", "version": "0", "versionType": "semver", "lessThanOrEqual": "3.5.1"}, {"status": "unaffected", "version": "45fbe2f7e0e8feee30105d42d66ed63fb6177ebe", "versionType": "git"}], "packageURL": "pkg:github/hashgraph/guardian", "defaultStatus": "unknown"}]}], "published": "2026-04-09T18:17:01.870", "references": [{"url": "https://github.com/hashgraph/guardian/commit/45fbe2f7e0e8feee30105d42d66ed63fb6177ebe", "source": "disclosure@vulncheck.com"}, {"url": "https://github.com/hashgraph/guardian/pull/5929", "tags": ["Issue Tracking"], "source": "disclosure@vulncheck.com"}, {"url": "https://www.vulncheck.com/advisories/hashgraph-guardian-unsandboxed-javascript-execution-rce", "tags": ["Third Party Advisory"], "source": "disclosure@vulncheck.com"}], "vulnStatus": "Modified", "weaknesses": [{"type": "Secondary", "source": "disclosure@vulncheck.com", "description": [{"lang": "en", "value": "CWE-668"}]}], "descriptions": [{"lang": "en", "value": "Hashgraph Guardian through version 3.5.1, fixed in commit 45fbe2f, contains an unsandboxed JavaScript execution vulnerability in the Custom Logic policy block worker that allows authenticated Standard Registry users to execute arbitrary code by passing user-supplied JavaScript expressions directly to the Node.js Function() constructor without isolation. Attackers can import native Node.js modules to read arbitrary files from the container filesystem, access process environment variables containing sensitive credentials such as RSA private keys, JWT signing keys, and API tokens, and forge valid authentication tokens for any user including administrators."}, {"lang": "es", "value": "Hashgraph Guardian hasta la versi\u00f3n 3.5.0 contiene una vulnerabilidad de ejecuci\u00f3n de JavaScript sin aislamiento en el worker del bloque de pol\u00edtica Custom Logic que permite a usuarios autenticados de Standard Registry ejecutar c\u00f3digo arbitrario al pasar expresiones JavaScript proporcionadas por el usuario directamente al constructor Node.js Function() sin aislamiento. Los atacantes pueden importar m\u00f3dulos nativos de Node.js para leer archivos arbitrarios del sistema de archivos del contenedor, acceder a variables de entorno del proceso que contienen credenciales sensibles como claves privadas RSA, claves de firma JWT y tokens de API, y forjar tokens de autenticaci\u00f3n v\u00e1lidos para cualquier usuario, incluidos los administradores."}], "lastModified": "2026-10-26T21:10:00.170", "configurations": [{"nodes": [{"negate": false, "cpeMatch": [{"criteria": "cpe:2.3:a:hedera:guardian:*:*:*:*:*:*:*:*", "vulnerable": true, "matchCriteriaId": "3CA6D6AC-BE68-4EFB-9563-D9E3281FA715", "versionEndIncluding": "3.5.0"}], "operator": "OR"}]}], "sourceIdentifier": "disclosure@vulncheck.com"}