CVE-2026-92949

medium

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.

References

https://www.vulncheck.com/advisories/vm2-3.9.6-before-3.11.7-sandbox-bypass-via-accessor-descriptor

https://github.com/patriksimek/vm2/security/advisories/GHSA-633r-hq9m-c4ff

https://github.com/patriksimek/vm2/releases/tag/v3.11.7

https://github.com/patriksimek/vm2/commit/d6ef73bd46488102dae8f4bc35f3f3c0eba2ea64

https://euvd.enisa.europa.eu/vulnerability/EUVD-2026-81598

Details

Source: Mitre, NVD

Published: 2026-09-17

Updated: 2026-09-21

Risk Information

CVSS v2

Base Score: 2.6

Vector: CVSS2#AV:N/AC:H/Au:N/C:N/I:P/A:N

Severity: Low

CVSS v3

Base Score: 4

Vector: CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:C/C:N/I:L/A:N

Severity: Medium

CVSS v4

Base 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

Severity: Medium

EPSS

EPSS: 0.00319