CVE-2026-43999CWE-829CWE-863broken-access-control

CVE-2026-43999

Critical · published May 13, 2026

CVSS v3.1
9.9
EPSS
1%
Percentile
61.5
In the wild
Unconfirmed
What it is

vm2 is an open source vm/sandbox for Node.js. Prior to 3.11.0, NodeVM's builtin allowlist can be bypassed when the module builtin is allowed (including via the '*' wildcard). The module builtin exposes Node's Module._load(), which loads any module by name directly in the host context, completely bypassing vm2's builtin restriction. This allows sandboxed code to load excluded builtins like child_process and achieve remote code execution. This vulnerability is fixed in 3.11.0.

The record
Technical detail
CVSS v3.1
9.9 · CRITICAL
Vector
CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:C/C:H/I:H/A:H
CVSS v4.0
Not supplied
EPSS
0.00970 · 61.5th percentile
Weaknesses
CWE-829 · Inclusion of Functionality from Untrusted Control Sphere; CWE-863 · Incorrect Authorization
Published
2026-05-13T22:16Z
Affected products (1)
ProductVersionsFixed in
vm2_project/vm2< 3.11.03.11.0
References (6)
EPSS history
Timeline
  • 13 MAY 17:21Z
    vm2: NodeVM builtin allowlist bypass via `module` builtin's `Module._load` allows sandbox escape
    cvelistv5