CVE-2026-47210: vm2 sandbox escape via JSPI-backed Promise `.finally()` species bypass
patriksimek · vm2
Affected: patriksimek vm2 · Exploitation: possible (1 to 10%)
Not in CyberSIXT coverage yet: no article names this CVE. This page shows the public record.
Higher than 77% of scored CVEs
DescriptionCVE.org
vm2 is an open source vm/sandbox for Node.js. Prior to version 3.11.4, a sandbox escape vulnerability in vm2 allows arbitrary code execution in the host process when untrusted code is executed with async support on runtimes exposing WebAssembly JSPI (WebAssembly.promising / WebAssembly.Suspending). In the tested configuration, a JSPI-backed Promise can reach Promise.prototype.finally() in a way that bypasses the expected Promise-species hardening and exposes a host-originated rejection object to attacker-controlled species logic, breaking the sandbox boundary. This issue has been patched in version 3.11.4.
Affected products1
From the CVE record. A product or version that is not listed is unknown, not unaffected.
- patriksimek · vm2< 3.11.4
On the Atlas
Every published CVE is on the CyberSIXT Atlas, grouped by weakness, vendor and month.
- Exploitation
- Possible (1 to 10%). EPSS between 1% and 10%.
- CISA KEV
- Not listed
- Public check
- No public nuclei template
- Weakness
- Improper Control of Dynamically-Managed Code Resources · Deserialization and Object Injection
- Vendor
- patriksimek
- Published
- June 2026
CoverageNo articles yet
No CyberSIXT article names CVE-2026-47210 yet, so there is no coverage timeline, action brief or change log for it. Everything on this page comes from the public CVE record, CISA KEV, EPSS and the nuclei template index. Search the archive or see the CVEs in the news.