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.
Attack Parameters
Attack Vector
Network
Can be exploited remotely
Attack Complexity
Low
Easy to exploit
Attack Requirements
None
No additional conditions
Privileges Required
None
No privileges needed
User Interaction
None
No user interaction needed
Impact Assessment
Confidentiality
High
Complete data leak
Integrity
High
Complete data modification
Availability
High
Complete denial of service
CVSS Vector v4.0
Weakness Type (CWE)
References 4
https://github.com/patriksimek/vm2/commit/4635ddd85839461c8ad791990023a477efefe…
disclosure@vulncheck.com
https://github.com/patriksimek/vm2/commit/7b26e81087ec88c287d9a4812f969d412f327…
disclosure@vulncheck.com
https://github.com/patriksimek/vm2/security/advisories/GHSA-27g9-p43v-cw3v
disclosure@vulncheck.com
https://www.vulncheck.com/advisories/vm2-3.10.2-through-3.11.6-sandbox-escape-v…
disclosure@vulncheck.com