{"id":"GHSA-28q4-xrqh-9479","title":"Duplicate Advisory: vm2: NodeVM node:-prefixed negative builtin deny bypass exposes child_process","summary":"Duplicate Advisory: vm2: NodeVM node:-prefixed negative builtin deny bypass exposes child_process","severity":"critical","cvss":9.9,"cwe":["CWE-269"],"vendor":"vm2","product":"vm2","ecosystem":"npm","affected":["vm2 <= 3.11.6"],"published":"2026-09-17","updated":"2026-10-01","sourceUpdated":"2026-10-01T15:35:49Z","source":"GHSA","sourceUrl":"https://github.com/advisories/GHSA-28q4-xrqh-9479","references":[{"url":"https://github.com/patriksimek/vm2/security/advisories/GHSA-8686-vhfx-7r3j"},{"url":"https://nvd.nist.gov/vuln/detail/CVE-2026-92957"},{"url":"https://www.vulncheck.com/advisories/vm2-before-3.11.7-authentication-bypass-via-node-prefix"},{"url":"https://github.com/advisories/GHSA-28q4-xrqh-9479"}],"tags":["ghsa","npm"],"ingestedAt":"2026-10-01T15:48:17.824Z","slug":"GHSA-28q4-xrqh-9479","body":"## Overview\n\n## Duplicate Advisory\n\nThis advisory has been withdrawn because it is a duplicate of GHSA-8686-vhfx-7r3j. This link is maintained to preserve external references.\n\n## Original Description\nvm2 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\")\n\n## Affected packages\n\n- `vm2 <= 3.11.6`\n\n## Remediation\n\nRefer to the advisory for the patched release.","depth":"midnight","depthScore":54,"depthScoreParts":{"impact":54.5,"likelihood":0,"exploitation":0,"ransomware":0},"changes":[]}