CVE-2026-92957vm2 before 3.11.7 NodeVM Builtin Deny-List Bypass via node: Prefix
Updated under an hour ago ()
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No exploitation reported and no EPSS estimate yet.
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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.
- CVSS
- 9.9 CRITICAL (v3.1, CNA)CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:C/C:H/I:H/A:H
- Weakness (CWE)
- CWE-269
- Known exploited
- Not in CISA's KEV catalog
- EPSS (exploitation in the next 30 days)
- Not loaded for this CVE
- Assigned by
- VulnCheck
- NVD analysis
- Deferred
- Record last updated
- Sep 26, 2026
- First seen by InfoSec Signals
- Oct 9, 2026
Affected products
patriksimek vm2 patriksimek:vm2 (from the name) | before 3.11.7; 3.11.7 not affected | CNA record |
References
- https://github.com/patriksimek/vm2/security/advisories/GHSA-8686-vhfx-7r3jvendor-advisory
- https://www.vulncheck.com/advisories/vm2-before-3.11.7-authentication-bypass-via-node-prefixthird-party-advisory
The CVE record on cve.org NVD's entry
The CVE record is authoritative. Products marked “from the name” were identified from the CNA's free-text names, not a CPE, and are matched less certainly. This product uses the NVD API but is not endorsed or certified by the NVD.