{"dataType": "CVE_RECORD", "dataVersion": "5.2", "cveMetadata": {"cveId": "CVE-2026-92949", "assignerOrgId": "83251b91-4cc7-4094-a5c7-464a1b83ea10", "state": "PUBLISHED", "assignerShortName": "VulnCheck", "dateReserved": "2026-09-17T12:43:03.568Z", "datePublished": "2026-09-17T13:46:09.471Z", "dateUpdated": "2026-09-17T13:46:09.471Z"}, "containers": {"cna": {"providerMetadata": {"orgId": "83251b91-4cc7-4094-a5c7-464a1b83ea10", "shortName": "VulnCheck", "dateUpdated": "2026-09-17T13:46:09.471Z"}, "datePublic": "2026-08-24T00:00:00.000Z", "title": "vm2 3.9.6 before 3.11.7 Sandbox Bypass via Accessor Descriptor", "descriptions": [{"lang": "en", "value": "vm2 versions from 3.9.6 before 3.11.7 fail to properly restrict access to accessor properties on frozen objects, allowing sandboxed scripts to bypass vm.freeze() and vm.readonly() protections. Attackers can use Object.getOwnPropertyDescriptor() or __lookupSetter__() to extract and invoke host object setters directly, mutating properties the embedder explicitly marked read-only."}], "problemTypes": [{"descriptions": [{"lang": "en", "description": "Modification of Assumed-Immutable Data (MAID)", "cweId": "CWE-471", "type": "CWE"}]}], "affected": [{"vendor": "patriksimek", "product": "vm2", "defaultStatus": "unaffected", "packageURL": "pkg:npm/vm2", "versions": [{"version": "3.9.6", "status": "affected", "versionType": "semver", "lessThan": "3.11.7"}, {"version": "3.11.7", "status": "unaffected", "versionType": "semver"}]}], "metrics": [{"format": "CVSS", "cvssV4_0": {"version": "4.0", "vectorString": "CVSS:4.0/AV:N/AC:H/AT:P/PR:N/UI:N/VC:N/VI:L/VA:N/SC:N/SI:L/SA:N", "attackVector": "NETWORK", "attackComplexity": "HIGH", "attackRequirements": "PRESENT", "privilegesRequired": "NONE", "userInteraction": "NONE", "vulnConfidentialityImpact": "NONE", "vulnIntegrityImpact": "LOW", "vulnAvailabilityImpact": "NONE", "subConfidentialityImpact": "NONE", "subIntegrityImpact": "LOW", "subAvailabilityImpact": "NONE", "baseScore": 6.3, "baseSeverity": "MEDIUM"}}, {"format": "CVSS", "cvssV3_1": {"version": "3.1", "vectorString": "CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:C/C:N/I:L/A:N", "attackVector": "NETWORK", "attackComplexity": "HIGH", "privilegesRequired": "NONE", "userInteraction": "NONE", "scope": "CHANGED", "confidentialityImpact": "NONE", "integrityImpact": "LOW", "availabilityImpact": "NONE", "baseScore": 4, "baseSeverity": "MEDIUM"}}], "references": [{"url": "https://github.com/patriksimek/vm2/security/advisories/GHSA-633r-hq9m-c4ff", "tags": ["vendor-advisory"], "name": "GitHub Security Advisory (GHSA-633r-hq9m-c4ff)"}, {"name": "VulnCheck Advisory: vm2 3.9.6 before 3.11.7 Sandbox Bypass via Accessor Descriptor", "tags": ["third-party-advisory"], "url": "https://www.vulncheck.com/advisories/vm2-3.9.6-before-3.11.7-sandbox-bypass-via-accessor-descriptor"}], "credits": [{"lang": "en", "value": "oran-s", "type": "reporter"}], "x_generator": {"engine": "vulncheck-endgame"}}}}

{}

{"affected": [{"affectedData": [{"defaultStatus": "unaffected", "packageURL": "pkg:npm/vm2", "product": "vm2", "vendor": "patriksimek", "versions": [{"lessThan": "3.11.7", "status": "affected", "version": "3.9.6", "versionType": "semver"}, {"status": "unaffected", "version": "3.11.7", "versionType": "semver"}]}], "source": "disclosure@vulncheck.com"}], "cveTags": [], "descriptions": [{"lang": "en", "value": "vm2 versions from 3.9.6 before 3.11.7 fail to properly restrict access to accessor properties on frozen objects, allowing sandboxed scripts to bypass vm.freeze() and vm.readonly() protections. Attackers can use Object.getOwnPropertyDescriptor() or __lookupSetter__() to extract and invoke host object setters directly, mutating properties the embedder explicitly marked read-only."}], "id": "CVE-2026-92949", "lastModified": "2026-09-17T14:18:00.583", "metrics": {"cvssMetricV31": [{"cvssData": {"attackComplexity": "HIGH", "attackVector": "NETWORK", "availabilityImpact": "NONE", "baseScore": 4.0, "baseSeverity": "MEDIUM", "confidentialityImpact": "NONE", "integrityImpact": "LOW", "privilegesRequired": "NONE", "scope": "CHANGED", "userInteraction": "NONE", "vectorString": "CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:C/C:N/I:L/A:N", "version": "3.1"}, "exploitabilityScore": 2.2, "impactScore": 1.4, "source": "disclosure@vulncheck.com", "type": "Primary"}], "cvssMetricV40": [{"cvssData": {"Automatable": "NOT_DEFINED", "Recovery": "NOT_DEFINED", "Safety": "NOT_DEFINED", "attackComplexity": "HIGH", "attackRequirements": "PRESENT", "attackVector": "NETWORK", "availabilityRequirement": "NOT_DEFINED", "baseScore": 6.3, "baseSeverity": "MEDIUM", "confidentialityRequirement": "NOT_DEFINED", "exploitMaturity": "NOT_DEFINED", "integrityRequirement": "NOT_DEFINED", "modifiedAttackComplexity": "NOT_DEFINED", "modifiedAttackRequirements": "NOT_DEFINED", "modifiedAttackVector": "NOT_DEFINED", "modifiedPrivilegesRequired": "NOT_DEFINED", "modifiedSubAvailabilityImpact": "NOT_DEFINED", "modifiedSubConfidentialityImpact": "NOT_DEFINED", "modifiedSubIntegrityImpact": "NOT_DEFINED", "modifiedUserInteraction": "NOT_DEFINED", "modifiedVulnAvailabilityImpact": "NOT_DEFINED", "modifiedVulnConfidentialityImpact": "NOT_DEFINED", "modifiedVulnIntegrityImpact": "NOT_DEFINED", "privilegesRequired": "NONE", "providerUrgency": "NOT_DEFINED", "subAvailabilityImpact": "NONE", "subConfidentialityImpact": "NONE", "subIntegrityImpact": "LOW", "userInteraction": "NONE", "valueDensity": "NOT_DEFINED", "vectorString": "CVSS:4.0/AV:N/AC:H/AT:P/PR:N/UI:N/VC:N/VI:L/VA:N/SC:N/SI:L/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", "version": "4.0", "vulnAvailabilityImpact": "NONE", "vulnConfidentialityImpact": "NONE", "vulnIntegrityImpact": "LOW", "vulnerabilityResponseEffort": "NOT_DEFINED"}, "source": "disclosure@vulncheck.com", "type": "Secondary"}]}, "published": "2026-09-17T14:18:00.463", "references": [{"source": "disclosure@vulncheck.com", "url": "https://github.com/patriksimek/vm2/security/advisories/GHSA-633r-hq9m-c4ff"}, {"source": "disclosure@vulncheck.com", "url": "https://www.vulncheck.com/advisories/vm2-3.9.6-before-3.11.7-sandbox-bypass-via-accessor-descriptor"}], "sourceIdentifier": "disclosure@vulncheck.com", "vulnStatus": "Deferred", "weaknesses": [{"description": [{"lang": "en", "value": "CWE-471"}], "source": "disclosure@vulncheck.com", "type": "Primary"}]}

{"bugzilla": {"description": "vm2: vm2: Sandbox bypass allows unauthorized data modification.", "id": "2536060", "url": "https://bugzilla.redhat.com/show_bug.cgi?id=2536060"}, "csaw": false, "cvss3": {"cvss3_base_score": "4.0", "cvss3_scoring_vector": "CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:C/C:N/I:L/A:N", "status": "draft"}, "cwe": "CWE-807", "details": ["A flaw was found in vm2, a JavaScript sandbox. This vulnerability allows sandboxed scripts to bypass security protections, specifically `vm.freeze()` and `vm.readonly()`, which are designed to prevent unauthorized modifications to objects. An attacker can exploit this by directly accessing and invoking setters for properties intended to be read-only, leading to unauthorized data modification within the sandbox environment."], "mitigation": {"lang": "en:us", "value": "Mitigation for this issue is either not available or the currently available options do not meet the Red Hat Product Security criteria comprising ease of use and deployment, applicability to widespread installation base, or stability."}, "name": "CVE-2026-92949", "public_date": "2026-09-17T13:46:09Z", "references": ["https://www.cve.org/CVERecord?id=CVE-2026-92949\nhttps://nvd.nist.gov/vuln/detail/CVE-2026-92949\nhttps://github.com/patriksimek/vm2/security/advisories/GHSA-633r-hq9m-c4ff\nhttps://www.vulncheck.com/advisories/vm2-3.9.6-before-3.11.7-sandbox-bypass-via-accessor-descriptor"], "statement": "This Moderate impact flaw in vm2 allows sandboxed JavaScript code to bypass `vm.freeze()` and `vm.readonly()` protections. An attacker capable of executing scripts within the vm2 sandbox could modify properties intended to be read-only, undermining the integrity of the sandboxed environment. This could lead to unauthorized data manipulation within applications utilizing vm2, such as Red Hat Ansible Automation Platform and Red Hat Developer Hub.", "threat_severity": "Moderate"}

{"affected": [{"configurations": [{"platform": null, "status": "affected", "versions": {"scheme": "semver", "value": "[3.9.6,3.11.7)"}}, {"platform": null, "status": "unaffected", "versions": {"scheme": "semver", "value": "3.11.7"}}], "enrichment": {"confidence": 100.0, "confidence_source": "matching", "scores": [{"score": 100.0, "source": "matching"}]}, "original": {"product": "vm2", "source": "cna", "vendor": "patriksimek"}, "product": "vm2", "vendor": "patriksimek"}], "created": "2026-09-17T23:00:12.778431+00:00", "updated": "2026-09-17T23:45:17.295673+00:00", "vendors": ["patriksimek", "patriksimek$PRODUCT$vm2"]}