CVE-2026-92949
vm2 3.9.6 before 3.11.7 Sandbox Bypass via Accessor Descriptor
- State
- Published
- Severity
- 6.3 Medium
- Published
- Sep 17, 2026
- Updated
- Sep 21, 2026
- Reserved
- Sep 17, 2026
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.
Scores
| CVSS | Score | Vector | Source |
|---|---|---|---|
| 4.0 | 6.3 Medium | 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 | VulnCheck |
| 3.1 | 4.0 Medium | CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:C/C:N/I:L/A:N | VulnCheck |
Weaknesses
- CWE-471 Modification of Assumed-Immutable Data (MAID)
Affected Products
| Product | Versions |
|---|---|
vm2patriksimek |
|
References
- GitHub Security Advisory (GHSA-633r-hq9m-c4ff)vendor-advisory
- VulnCheck Advisory: vm2 3.9.6 before 3.11.7 Sandbox Bypass via Accessor Descriptorthird-party-advisory
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