{"id":"CVE-2026-92958","published":"2026-09-17T14:18:01.970","lastModified":"2026-09-18T20:17:31.243","description":"vm2 through 3.11.6 contains a builtin-module denylist bypass in NodeVM. When the embedder uses the builtin wildcard together with negative entries (e.g. require: { builtin: ['*', '-fs', '-child_process'] }), negative entries are matched by exact module name in lib/builtin.js, so -fs removes only the builtin named fs and does not remove builtin subpaths such as fs/promises. Sandboxed code can therefore call require('fs/promises') or require('node:fs/promises') and reach the promise-based filesystem API despite fs being denied; node: prefix handling is likewise inconsistent (a -node:fs/promises entry does not block require('fs/promises')). Host file creation and writing were confirmed via fsp.writeFile(), and other fs/promises operations (cp, mkdir, rename, rm, rmdir, truncate, read operations, etc.) are also reachable. This issue is fixed in vm2 3.11.7.","cvssScore":8.5,"cvssSeverity":"HIGH","cvssVector":"CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:C/C:N/I:H/A:L","cwes":["CWE-269"],"vendors":[],"products":[],"references":[{"url":"https://github.com/patriksimek/vm2/security/advisories/GHSA-6rh5-qq4q-97xh","tags":[]},{"url":"https://www.vulncheck.com/advisories/vm2-before-3.11.7-denylist-bypass-via-fs-promises","tags":[]},{"url":"https://github.com/patriksimek/vm2/security/advisories/GHSA-6rh5-qq4q-97xh","tags":[]}],"exploitRefs":[{"url":"https://github.com/patriksimek/vm2/security/advisories/GHSA-6rh5-qq4q-97xh","tags":[]},{"url":"https://github.com/patriksimek/vm2/security/advisories/GHSA-6rh5-qq4q-97xh","tags":[]}],"hasPoc":true,"ai":null}