CVE-2026-92944
vm2 3.10.2 through 3.11.6 Sandbox Escape via Promise Protector
- State
- Published
- Severity
- 9.3 Critical
- Published
- Sep 17, 2026
- Updated
- Sep 19, 2026
- Reserved
- Sep 17, 2026
Description
vm2 versions 3.10.2 through 3.11.6 contain a sandbox escape vulnerability on Node.js 26 where Promise.prototype.finally() bypasses vm2's wrapper protections due to a stale PromiseThenLookupChain protector in V8 14.6. Attackers can exploit this by creating an async function that returns a Promise with an attacker-controlled constructor Symbol.species, allowing them to reach the host Function constructor and process object for arbitrary code execution.
Scores
| CVSS | Score | Vector | Source |
|---|---|---|---|
| 4.0 | 9.3 Critical | CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:H/VI:H/VA:H/SC:N/SI:N/SA:N | VulnCheck |
| 3.1 | 9.8 Critical | CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H | VulnCheck |
Weaknesses
- CWE-693 Protection Mechanism Failure
Affected Products
| Product | Versions |
|---|---|
vm2patriksimek |
|
References
- GitHub Security Advisory (GHSA-27g9-p43v-cw3v)vendor-advisory
- Patch Commitpatch
- Patch Commitpatch
- VulnCheck Advisory: vm2 3.10.2 through 3.11.6 Sandbox Escape via Promise Protectorthird-party-advisory
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