CVE-2026-92944

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.

References

• https://github.com/patriksimek/vm2/commit/4635ddd85839461c8ad791990023a477efefe7bd
• https://github.com/patriksimek/vm2/commit/7b26e81087ec88c287d9a4812f969d412f32774e
• https://github.com/patriksimek/vm2/security/advisories/GHSA-27g9-p43v-cw3v
• https://www.vulncheck.com/advisories/vm2-3.10.2-through-3.11.6-sandbox-escape-via-promise-protector