{"id":"CVE-2026-92949","title":"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","summary":"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.getOwnPropertyDescr…","severity":"medium","cvss":4,"cvssVector":"CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:C/C:N/I:L/A:N","cwe":["CWE-471","CWE-807"],"vendor":"patriksimek","product":"vm2","affected":["vm2 >= 3.9.6 < 3.11.7"],"published":"2026-09-17","updated":"2026-09-21","sourceUpdated":"2026-09-21T18:17:15.850","source":"NVD","sourceUrl":"https://nvd.nist.gov/vuln/detail/CVE-2026-92949","references":[{"url":"https://github.com/patriksimek/vm2/security/advisories/GHSA-633r-hq9m-c4ff","label":"disclosure@vulncheck.com"},{"url":"https://www.vulncheck.com/advisories/vm2-3.9.6-before-3.11.7-sandbox-bypass-via-accessor-descriptor","label":"disclosure@vulncheck.com"},{"url":"https://github.com/patriksimek/vm2/security/advisories/GHSA-633r-hq9m-c4ff","label":"134c704f-9b21-4f2e-91b3-4a467353bcc0"},{"url":"https://security.access.redhat.com/data/csaf/v2/vex/2026/cve-2026-92949.json"},{"url":"https://access.redhat.com/security/cve/CVE-2026-92949"},{"url":"https://www.cve.org/CVERecord?id=CVE-2026-92949"},{"url":"https://nvd.nist.gov/vuln/detail/CVE-2026-92949"},{"url":"https://bugzilla.redhat.com/show_bug.cgi?id=2536060"}],"tags":["nvd","cve.org","csaf","vex","red-hat","exploit-available"],"epss":0.00246,"epssPercentile":0.16192,"exploitAvailable":true,"ssvc":{"exploitation":"poc","automatable":"no","technicalImpact":"partial","timestamp":"2026-09-21T17:14:06.865069Z"},"ingestedAt":"2026-09-17T14:19:30.987Z","slug":"CVE-2026-92949","body":"## Overview\n\nvm2 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.\n\n## Remediation\n\nRefer to the linked advisories for vendor-supplied fixes and affected version ranges.\n\n## Vendor advisories\n\n- **Red Hat VEX** · Moderate · affected: Red Hat Developer Hub, Self-service automation portal 2 · no fix planned: Red Hat Developer Hub, Self-service automation portal 2 · updated 2026-09-18 · [vex](https://security.access.redhat.com/data/csaf/v2/vex/2026/cve-2026-92949.json)","depth":"twilight","depthScore":34,"depthScoreParts":{"impact":22,"likelihood":0,"exploitation":12,"ransomware":0},"changes":[{"seq":208641,"id":"CVE-2026-92949","ts":1790013049896,"field":"exploit_available","old":"false","new":"true"}]}