critical9.9
CVE-2026-43999
vm2 has a NodeVM builtin allowlist bypass via `module` builtin's `Module._load` that allows sandbox escape
Impact
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.
Affected packages
| Ecosystem | Package | Affected | Fixed in |
|---|---|---|---|
| npm | vm2 | = 3.10.5 | 3.11.0 |
Affected products
| Vendor | Product | Affected versions |
|---|---|---|
| Vm2 Project | Vm2 | before 3.11.0 |
Weakness classification
References
- NVD record
- CVE.org record
- GitHub advisory
- https://github.com/advisories/GHSA-947f-4v7f-x2v8
- https://github.com/patriksimek/vm2/security/advisories/GHSA-947f-4v7f-x2v8
- https://nvd.nist.gov/vuln/detail/CVE-2026-43999
- https://access.redhat.com/errata/RHSA-2026:50850
- https://access.redhat.com/security/cve/CVE-2026-43999
- https://bugzilla.redhat.com/show_bug.cgi?id=2477196
- https://security.access.redhat.com/data/csaf/v2/vex/2026/cve-2026-43999.json