CVE-2026-92949

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.

CVSS v3 4.0 MEDIUM

4.0^/10

CVSS v3 : MEDIUM

Vector :

Exploitability : 2.2 / Impact : 1.4

Attack Vector NETWORK

Attack Complexity HIGH

Privileges Required NONE

User Interaction NONE

Confidentiality Impact NONE

Integrity Impact LOW

Availability Impact NONE

Scope CHANGED

References

Link	Resource
https://github.com/patriksimek/vm2/security/advisories/GHSA-633r-hq9m-c4ff
https://www.vulncheck.com/advisories/vm2-3.9.6-before-3.11.7-sandbox-bypass-via-accessor-descriptor

Configurations

No configuration.

History

17 Sep 2026, 14:18

Type	Values Removed	Values Added
New CVE

Information

Published : 2026-09-17 14:18

Updated : 2026-09-17 14:18

NVD link : CVE-2026-92949

Mitre link : CVE-2026-92949

CVE.ORG link : CVE-2026-92949

JSON object : View

Products Affected

No product.

CWE

CWE-471

Modification of Assumed-Immutable Data (MAID)

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