CVE-2026-47135
High
Description
vm2 is an open source vm/sandbox for Node.js. Prior to version 3.11.4, Symbol.for override in setup-sandbox.js only intercepts 2 of 9 dangerous Node.js cross-realm symbols. Combined with the bridge's set/defineProperty/deleteProperty traps having no isDangerousCrossRealmSymbol key check, sandbox code can obtain real cross-realm symbols, write them to host objects, and control host-side behavior — verified with a full util.promisify hijack chain. This issue has been patched in version 3.11.4.
SeverityHigh
CVSS8.7
Exploit probability—
ProductVm2
PublishedJun 12, 2026
First seenJun 12, 2026
Weakness typeCWE-693CWE-693
How to fix
Update
- vm23.11.4 or later
Affected products
| Product | Affected versions | Fixed in |
|---|---|---|
| vm2npm | v < 3.11.4 | 3.11.4 |
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