CVE-2026-92957
vm2 through 3.11.6 does not normalize `node:`-prefixed builtin specifiers when evaluating user-supplied negative (deny) entries in a NodeVM wildcard require po…
Impact
vm2 through 3.11.6 does not normalize `node:`-prefixed builtin specifiers when evaluating user-supplied negative (deny) entries in a NodeVM wildcard require policy. Although NodeVM strips the `node:` prefix during require() resolution, negative wildcard entries are matched by exact string comparison against the canonical builtin names, so a policy such as `new NodeVM({ require: { builtin: ['*', '-node:child_process'] } })` fails to deny the canonical `child_process` module. Sandboxed code can therefore obtain the host `child_process` builtin via `require('child_process')` or `require('node:child_process')`, gaining references to process-spawning APIs such as execSync and spawn, which is equivalent to host command-execution capability for untrusted sandbox code. Fixed in vm2 3.11.7.
Affected packages
| Ecosystem | Package | Affected | Fixed in |
|---|---|---|---|
| npm | vm2 | <= 3.11.6 | 3.11.7 |
Weakness classification
References
- NVD record
- CVE.org record
- GitHub advisory
- https://github.com/advisories/GHSA-8686-vhfx-7r3j
- https://github.com/patriksimek/vm2/security/advisories/GHSA-8686-vhfx-7r3j
- https://nvd.nist.gov/vuln/detail/CVE-2026-92957
- https://github.com/patriksimek/vm2/commit/b0f50662dd499ff33544bb42387958c64711af1e
- https://github.com/patriksimek/vm2/releases/tag/v3.11.7
- https://www.vulncheck.com/advisories/vm2-before-3.11.7-authentication-bypass-via-node-prefix