{"document":{"category":"csaf_vex","csaf_version":"2.0","title":"CVE-2026-47137: vm2: GHSA-8hg8-63c5-gwmx patch bypass: nesting:true without explicit require still allows full RCE","publisher":{"category":"vendor","name":"HarborGuard Database","namespace":"https://database.harborguard.co"},"tracking":{"id":"CVE-2026-47137","status":"final","version":"1","initial_release_date":"2026-06-12T14:15:34.795Z","current_release_date":"2026-06-13T03:55:56.787Z","revision_history":[{"date":"2026-06-12T14:15:34.795Z","number":"1","summary":"Initial machine-readable export from HarborGuard."}]},"distribution":{"tlp":{"label":"WHITE"},"text":"Public CVE data; freely redistributable."},"notes":[{"category":"description","text":"vm2 is an open source vm/sandbox for Node.js. Prior to version 3.11.4, the fix for GHSA-8hg8-63c5-gwmx (CVE-2023-37903) introduced a check in nodevm.js line 263 that blocks the combination nesting: true + require: false. However, the check uses strict equality (options.require === false), which is trivially bypassed by omitting the require option entirely. When require is not specified, options.require is undefined, not false. The strict equality check fails, so the security guard is skipped. Immediately after (line 280), the destructuring default require: requireOpts = false assigns requireOpts = false, producing the exact configuration the patch was designed to prevent. This issue has been patched in version 3.11.4.","title":"CVE description"}],"references":[{"category":"self","summary":"CVE-2026-47137 on HarborGuard Database","url":"https://database.harborguard.co/cve/CVE-2026-47137"},{"category":"external","summary":"CVE Record","url":"https://www.cve.org/CVERecord?id=CVE-2026-47137"},{"category":"external","summary":"https://github.com/patriksimek/vm2/security/advisories/GHSA-m4wx-m65x-ghrr","url":"https://github.com/patriksimek/vm2/security/advisories/GHSA-m4wx-m65x-ghrr"},{"category":"external","summary":"https://github.com/patriksimek/vm2/commit/01a7552add345d5a6862623884e6b79a85bf0568","url":"https://github.com/patriksimek/vm2/commit/01a7552add345d5a6862623884e6b79a85bf0568"},{"category":"external","summary":"https://github.com/patriksimek/vm2/commit/86ab819f202c3a8dad88cef5705f2e416c5188d7","url":"https://github.com/patriksimek/vm2/commit/86ab819f202c3a8dad88cef5705f2e416c5188d7"},{"category":"external","summary":"https://github.com/advisories/GHSA-g644-9gfx-q4q4","url":"https://github.com/advisories/GHSA-g644-9gfx-q4q4"},{"category":"external","summary":"https://github.com/patriksimek/vm2/releases/tag/v3.11.4","url":"https://github.com/patriksimek/vm2/releases/tag/v3.11.4"}]},"product_tree":{"branches":[{"category":"vendor","name":"patriksimek","branches":[{"category":"product_name","name":"vm2","branches":[{"category":"product_version","name":"< 3.11.4","product":{"name":"patriksimek vm2 < 3.11.4","product_id":"CSAFPID-1","product_identification_helper":{"cpe":"cpe:2.3:a:patriksimek:vm2:\\<_3.11.4:*:*:*:*:*:*:*"}}}]}]}]},"vulnerabilities":[{"cve":"CVE-2026-47137","title":"vm2: GHSA-8hg8-63c5-gwmx patch bypass: nesting:true without explicit require still allows full RCE","notes":[{"category":"description","text":"vm2 is an open source vm/sandbox for Node.js. Prior to version 3.11.4, the fix for GHSA-8hg8-63c5-gwmx (CVE-2023-37903) introduced a check in nodevm.js line 263 that blocks the combination nesting: true + require: false. However, the check uses strict equality (options.require === false), which is trivially bypassed by omitting the require option entirely. When require is not specified, options.require is undefined, not false. The strict equality check fails, so the security guard is skipped. Immediately after (line 280), the destructuring default require: requireOpts = false assigns requireOpts = false, producing the exact configuration the patch was designed to prevent. This issue has been patched in version 3.11.4.","title":"CVE description"}],"product_status":{"known_affected":["CSAFPID-1"]},"scores":[{"cvss_v3":{"version":"3.1","vectorString":"CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:C/C:H/I:H/A:H","baseScore":10,"baseSeverity":"CRITICAL"},"products":["CSAFPID-1"]}],"remediations":[{"category":"none_available","details":"No fixed version is published yet. Monitor the upstream advisory.","product_ids":["CSAFPID-1"]}]}]}