Cloudanix VulnDB

CVE-2026-47135

High · 8.7

CVSS

8.7

EPSS

0.4%

Published

Jun 12, 2026

CISA due date

—

The record

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.

Affected packages

Ecosystem Package Introduced Fixed
npm vm2 0 3.11.4

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