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TI-2026-34726 Aliases CVE-2026-47135GHSA-m5q2-4fm3-vfqp

vm2: Sandbox escape via unblocked cross-realm Symbol.for keys + missing bridge write-trap symbol checks

Priority LOW 39CWE-693Published · Updated

Key facts

Attack vector
Network
Privileges required
None
User interaction
None
Attack complexity
High
Impact type
Security bypass
Confidentiality · integrity · availability
High · High · None
Fix status
Fixed

Attack profile from CVSS 3.1 · CNA. Fix status from CNA, GitHub and Red Hat. Impact type from CWE-693.

Summary

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.

Why it matters now

Exploitation None reported CISA SSVC · not in CISA KEV
EPSS 0.00266 18th percentileScored 2026-11-07
Fix Fixed vm2 (patriksimek): 3.11.4vm2 (npm): 3.11.4Red Hat: 3 advisories

SSVC decision points

CISA ADP · SSVC 2.0.3

Exploitation
None
Automatable
No
Technical impact
Total

The decision (Track, Attend, Act) also depends on your mission and well-being impact; see CISA's SSVC guide.

Affected products

VendorProductAffected versionsFixed inStatusSource
patriksimekvm2before 3.11.43.11.4Patch availableCNA
—vm2 (npm)before 3.11.43.11.4Patch availableGHSA-m5q2-4fm3-vfqp
  • vm2 Vendorpatriksimek Affected before 3.11.4 Fixed in 3.11.4 Patch available CNA
  • vm2 (npm) Vendor— Affected before 3.11.4 Fixed in 3.11.4 Patch available GHSA-m5q2-4fm3-vfqp

CPE names Threatist (inferred) · 1

Inferred from how NVD named this product before; not given by a source.

CPEVersionsRoleVendor
cpe:2.3:a:vm2_project:vm2:*:*:*:*:*:*:*:*——patriksimek
  • cpe:2.3:a:vm2_project:vm2:*:*:*:*:*:*:*:* Versions — — ·patriksimek

Remediation

  • Fix · CNA vm2 (patriksimek) Fixed in 3.11.4
  • Fix · GHSA-m5q2-4fm3-vfqp vm2 (npm) Fixed in 3.11.4 Advisory →

Red Hat 3 advisories

  • RHSA-2026:50850 Released 2026-08-05 · Red Hat rating Important
    Red Hat Ansible Automation Platform 2.1 security update
    • Red Hat Ansible Automation Platform 2.1 registry.redhat.io/ansible-automation-platform/automation-portal
  • RHSA-2026:36754 Released 2026-07-08 · Red Hat rating Important
    Red Hat Developer Hub 1.10.2 release.
    • Red Hat Developer Hub 1.10 registry.redhat.io/rhdh/rhdh-hub-rhel9, registry.redhat.io/rhdh/rhdh-rhel9-operator
  • RHSA-2026:33574 Released 2026-06-30 · Red Hat rating Important
    Red Hat Developer Hub 1.9.6 release.
    • Red Hat Developer Hub 1.9 registry.redhat.io/rhdh/rhdh-hub-rhel9, registry.redhat.io/rhdh/rhdh-rhel9-operator

Vendor assessments

Red Hat

Red Hat rating: Moderate. Red Hat's page for this CVE →

ProductStatusPlan or fix
Red Hat Ansible Automation Platform 2.1Fixed RHSA-2026:50850
Red Hat Developer Hub 1.10Fixed RHSA-2026:36754
Red Hat Developer Hub 1.9Fixed RHSA-2026:33574
Not affected: 2 products
  • Red Hat Developer Hub 1.10
  • Red Hat Developer Hub 1.9

Timeline

  1. 2026-10-02 Threatist record created from CVE-2026-47135
  2. 2026-10-03 Alias added: GHSA-m5q2-4fm3-vfqp
  3. 2026-10-25 Priority changed: MEDIUM → LOW

References

Advisory 1

Other 4

  • TI-2023-14382 Sandbox Escape in vm2 CVSS 3.1CRITICAL 10.0
  • TI-2023-13478 vm2 Sandbox Escape vulnerability CVSS 3.1CRITICAL 10.0
  • TI-2026-63070 vm2 before 3.12.1 Sandbox Escape via Promise Symbol.species CVSS 4.0CRITICAL 10.0
  • TI-2026-63067 vm2 before 3.12.1 Sandbox Escape RCE via Non-Strict Host Function CVSS 4.0CRITICAL 10.0
  • TI-2026-62623 vm2 before 3.11.6 Process-wide State Exposure via os and dns CVSS 4.0CRITICAL 10.0
  • TI-2026-62618 vm2 before 3.11.8 Sandbox Escape via NodeVM CVSS 4.0CRITICAL 10.0
See all 80 →

Sources

This product uses the NVD API but is not endorsed or certified by the NVD. Sources and licences