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TI-2026-63070 Aliases CVE-2026-93606GHSA-q84h-7qfg-c6j8

vm2 before 3.12.1 Sandbox Escape via Promise Symbol.species

Priority HIGH 82CWE-693Published · Updated

Key facts

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

Attack profile from CVSS 4.0 · CNA. Fix status from CNA and Red Hat. Impact type from CWE-693.

Summary

vm2 (npm) versions 3.12.0 and earlier contain a sandbox escape in `VM` and `NodeVM`. When an embedder exposes a host API that returns a host-realm Promise, the bridge's rejection sanitizer (hostPromiseSanitizeReject / makeSanitizedPromiseCallback / normalizeHostPromiseCallbacks in lib/bridge.js) only wraps `then`/`catch` rejection slots that hold a function, and the sandbox-side `Symbol.species`/`.then` neutralization is installed only on the sandbox intrinsic `Promise.prototype`, so it never applies to a host Promise. Code running inside the sandbox can overwrite `p.constructor[Symbol.species]` on the host Promise and then call `p.then()` with no `onRejected` handler; V8 substitutes its internal Thrower, which re-throws the raw host rejection value into a resolve/reject closure captured by the attacker. This delivers an unsanitized, fully functional bridge proxy of the host object to sandboxed code, bypassing handleException and hostPromiseSanitizeReject. If the rejection value is host-pivotable (for example a host `process` object), this results in arbitrary code execution on the host. Fixed in 3.12.1.

Why it matters now

Exploitation Proof of concept CISA SSVC · not in CISA KEV
EPSS 0.00712 53rd percentileScored 2026-11-07
Fix Fixed vm2 (patriksimek): 3.12.1Red Hat: 6 advisories

SSVC decision points

CISA ADP · SSVC 2.0.3

Exploitation
Poc
Automatable
Yes
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 3.12.13.12.1Patch availableCNA
  • vm2 Vendorpatriksimek Affected before 3.12.1 Fixed in 3.12.1 Patch available CNA

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 3.12.1

Red Hat 6 advisories

  • RHSA-2026:91651 Released 2026-10-28 · Red Hat rating Critical
    Red Hat Developer Hub 1.9.10 release.
    • Red Hat Developer Hub 1.9 registry.redhat.io/rhdh/rhdh-hub-rhel9, registry.redhat.io/rhdh/rhdh-rhel9-operator
  • RHSA-2026:82151 Released 2026-10-13 · Red Hat rating Critical
    Ansible automation portal Red Hat Enterprise Linux Images
    • Red Hat Ansible Automation Platform 2.2 registry.redhat.io/ansible-automation-platform/bootc-automation-portal-rhel9
  • RHSA-2026:80644 Released 2026-10-12 · Red Hat rating Critical
    Ansible plug-ins for Red Hat Developer Hub Product Release Update
    • Red Hat Ansible Automation Platform 2.2 registry.redhat.io/ansible-automation-platform/automation-portal
Show 3 more Red Hat advisories
  • RHSA-2026:80603 Released 2026-10-12 · Red Hat rating Critical
    Ansible plug-ins for Red Hat Developer Hub Product Release Update
    • Red Hat Ansible Automation Platform 2.1 registry.redhat.io/ansible-automation-platform/automation-portal
  • RHSA-2026:79088 Released 2026-10-08 · Red Hat rating Critical
    Red Hat Developer Hub 1.10.5 release.
    • Red Hat Developer Hub 1.10 registry.redhat.io/rhdh/rhdh-hub-rhel9, registry.redhat.io/rhdh/rhdh-rhel9-operator
  • RHSA-2026:76788 Released 2026-10-06 · Red Hat rating Critical
    Red Hat Developer Hub 1.10.5 Plugin Catalog GA plugins release.
    • Red Hat Developer Hub 1.10 registry.redhat.io/rhdh/red-hat-developer-hub-backstage-plugin-lightspeed, registry.redhat.io/rhdh/red-hat-developer-hub-backstage-plugin-lightspeed-backend, registry.redhat.io/rhdh/red-hat-developer-hub-backstage-plugin-orchestrator +4

Fixed in the same release

Records fixed by the same vendor advisory or release, as the CNA lists them.

  • Release ·

    patriksimek vm2 3.12.1

    4 records Highest priority Priority HIGH 3 HIGH, 1 MEDIUM

    Other records, highest priority first

    • TI-2026-63067 vm2 before 3.12.1 Sandbox Escape RCE via Non-Strict Host FunctionPriority HIGH 82
    • TI-2026-63068 vm2 3.11.8 Sandbox Escape via crypto.setFipsPriority HIGH 70
    • TI-2026-63069 vm2 NodeVM before 3.12.1 Remote Code Execution via child_processPriority MEDIUM 49
    Show all 4 records →

Vendor assessments

Red Hat

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

ProductStatusPlan or fix
Red Hat Ansible Automation Platform 2.1Fixed RHSA-2026:80603
Red Hat Ansible Automation Platform 2.2Fixed RHSA-2026:80644, RHSA-2026:82151
Red Hat Developer Hub 1.10Fixed RHSA-2026:76788, RHSA-2026:79088
Red Hat Developer Hub 1.9Fixed RHSA-2026:91651
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-2026-93606
  2. 2026-10-03 Alias added: GHSA-q84h-7qfg-c6j8
  3. 2026-10-07 Fix available: RHSA-2026:76788 · Red Hat
  4. 2026-10-07 Fix available: Red Hat Developer Hub 1.10 · Red Hat
  5. 2026-10-09 Fix available: RHSA-2026:79088 · Red Hat
  6. 2026-10-09 Affected versions changed · Red Hat
  7. 2026-10-13 Fix available: RHSA-2026:80603 · Red Hat
  8. 2026-10-13 Fix available: RHSA-2026:80644 · Red Hat
  9. 2026-10-13 Fix available: Red Hat Ansible Automation Platform 2.1, Red Hat Ansible Automation Platform 2.2 · Red Hat
  10. 2026-10-13 Fix available: RHSA-2026:82151 · Red Hat
  11. 2026-10-30 Fix available: RHSA-2026:91651 · Red Hat
  12. 2026-10-30 Fix available: Red Hat Developer Hub 1.9 · Red Hat

References

Advisory 1

  • 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-2026-63067 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
  • TI-2026-62610 vm2 before 3.11.7 Memory Disclosure via Buffer Pool 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