High severity8.7GHSA Advisory· Published Jun 12, 2026· Updated Jun 12, 2026
CVE-2026-47135
CVE-2026-47135
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.
AI Insight
LLM-synthesized narrative grounded in this CVE's description and references.
Affected packages
Versions sourced from the GitHub Security Advisory.
| Package | Affected versions | Patched versions |
|---|---|---|
vm2npm | < 3.11.4 | 3.11.4 |
Affected products
2- Range: <= 3.11.3
Patches
Vulnerability mechanics
References
5- github.com/advisories/GHSA-m5q2-4fm3-vfqpghsaADVISORY
- nvd.nist.gov/vuln/detail/CVE-2026-47135ghsaADVISORY
- github.com/patriksimek/vm2/commit/928aef51898b5c52a05f05a40c4cfeb52e172878nvdWEB
- github.com/patriksimek/vm2/releases/tag/v3.11.4nvdWEB
- github.com/patriksimek/vm2/security/advisories/GHSA-m5q2-4fm3-vfqpnvdWEB
News mentions
1- vm2: Nine Sandbox Escape CVEs Disclosed in a Single-Day AdvisoryVypr Intelligence · May 29, 2026