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 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 v3 9.9 CRITICAL

9.9^/10

CVSS v3 : CRITICAL

V3 Legend

Vector :

Exploitability : 3.1 / Impact : 6.0

Attack Vector NETWORK

Attack Complexity LOW

Privileges Required LOW

User Interaction NONE

Confidentiality Impact HIGH

Integrity Impact HIGH

Availability Impact HIGH

Scope CHANGED

References

Link	Resource
https://github.com/patriksimek/vm2/security/advisories/GHSA-8686-vhfx-7r3j
https://www.vulncheck.com/advisories/vm2-before-3.11.7-authentication-bypass-via-node-prefix
https://github.com/patriksimek/vm2/security/advisories/GHSA-8686-vhfx-7r3j

Configurations

No configuration.

History

26 Sep 2026, 14:17

Type	Values Removed	Values Added
Summary	(en) 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. (Suggested title: "vm2 before 3.11.7: NodeVM builtin deny-list bypass via node:-prefixed specifiers exposes child_process")	(en) 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.

17 Sep 2026, 18:17

Type	Values Removed	Values Added
References	~~() https://github.com/patriksimek/vm2/security/advisories/GHSA-8686-vhfx-7r3j -~~	() https://github.com/patriksimek/vm2/security/advisories/GHSA-8686-vhfx-7r3j -

17 Sep 2026, 14:18

Type	Values Removed	Values Added
New CVE

Information

Published : 2026-09-17 14:18

Updated : 2026-09-26 14:17

NVD link : CVE-2026-92957

Mitre link : CVE-2026-92957

CVE.ORG link : CVE-2026-92957

JSON object : View

Products Affected

No product.

CWE

CWE-269

Improper Privilege Management

9.9 /10