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.
History

Wed, 23 Sep 2026 03:30:00 +0000

Type Values Removed Values Added
Metrics ssvc

{'options': {'Automatable': 'no', 'Exploitation': 'poc', 'Technical Impact': 'partial'}, 'version': '2.0.3'}


Fri, 18 Sep 2026 00:15:00 +0000

Type Values Removed Values Added
Weaknesses CWE-807
References
Metrics threat_severity

None

threat_severity

Moderate


Thu, 17 Sep 2026 23:15:00 +0000

Type Values Removed Values Added
First Time appeared Patriksimek
Patriksimek vm2
Vendors & Products Patriksimek
Patriksimek vm2

Thu, 17 Sep 2026 14:00:00 +0000

Type Values Removed Values Added
Description 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.
Title vm2 3.9.6 before 3.11.7 Sandbox Bypass via Accessor Descriptor
Weaknesses CWE-471
References
Metrics cvssV3_1

{'score': 4, 'vector': 'CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:C/C:N/I:L/A:N'}

cvssV4_0

{'score': 6.3, 'vector': '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'}


cve-icon MITRE

Status: PUBLISHED

Assigner: VulnCheck

Published: 2026-09-17T13:46:09.471Z

Updated: 2026-09-21T17:14:33.106Z

Reserved: 2026-09-17T12:43:03.568Z

Link: CVE-2026-92949

cve-icon Vulnrichment

Updated: 2026-09-21T17:14:27.043Z

cve-icon NVD

Status : Deferred

Published: 2026-09-17T14:18:00.463

Modified: 2026-09-21T18:17:15.850

Link: CVE-2026-92949

cve-icon Redhat

Severity : Moderate

Publid Date: 2026-09-17T13:46:09Z

Links: CVE-2026-92949 - Bugzilla