CVE-2026-47135 | THREATINT

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.

PUBLISHED Reserved 2026-05-18 | Published 2026-06-12 | Updated 2026-06-13 | Assigner GitHub_M

HIGH: 8.7CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:C/C:H/I:H/A:N

Problem types

CWE-693: Protection Mechanism Failure

Product status

< 3.11.4

affected

References

github.com/...ek/vm2/security/advisories/GHSA-m5q2-4fm3-vfqp

github.com/...ommit/928aef51898b5c52a05f05a40c4cfeb52e172878

github.com/patriksimek/vm2/releases/tag/v3.11.4

cve.org (CVE-2026-47135)

nvd.nist.gov (CVE-2026-47135)

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