{"id":"CVE-2026-47683","title":"vm2 is an open source vm/sandbox for Node.js","summary":"vm2 is an open source vm/sandbox for Node.js. Prior to 3.11.6, the bufferAllocLimit enforcement in lib/setup-sandbox.js does not cover Buffer.concat(list, totalLength) or Buffer.from(arrayLike) with an attacker-controlled length, allowin…","severity":"high","cwe":["CWE-770"],"vendor":"vm2","product":"vm2","affected":["vm2 <= 3.11.5"],"patched":["vm2 3.11.6"],"published":"2026-08-17","updated":"2026-09-09","sourceUpdated":"2026-09-09T21:11:46.833","source":"NVD","sourceUrl":"https://nvd.nist.gov/vuln/detail/CVE-2026-47683","references":[{"url":"https://github.com/patriksimek/vm2/commit/3ffb315512e634cf85c447375e85d6c83d00a4bd","label":"security-advisories@github.com"},{"url":"https://github.com/patriksimek/vm2/releases/tag/3.11.6","label":"security-advisories@github.com"},{"url":"https://github.com/patriksimek/vm2/security/advisories/GHSA-gmc2-2x9w-cgh9","label":"security-advisories@github.com"},{"url":"https://github.com/patriksimek/vm2/security/advisories/GHSA-gmc2-2x9w-cgh9","label":"134c704f-9b21-4f2e-91b3-4a467353bcc0"},{"url":"https://github.com/advisories/GHSA-gmc2-2x9w-cgh9"},{"url":"https://security.access.redhat.com/data/csaf/v2/vex/2026/cve-2026-47683.json"},{"url":"https://access.redhat.com/security/cve/CVE-2026-47683"},{"url":"https://bugzilla.redhat.com/show_bug.cgi?id=2517643"},{"url":"https://www.cve.org/CVERecord?id=CVE-2026-47683"},{"url":"https://nvd.nist.gov/vuln/detail/CVE-2026-47683"}],"tags":["nvd","ghsa","npm","csaf","vex","red-hat"],"epss":0.00393,"epssPercentile":0.33349,"aliases":["GHSA-gmc2-2x9w-cgh9"],"ecosystem":"npm","ingestedAt":"2026-08-17T17:58:10.675Z","cvss":7.5,"cvssVector":"CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H","cvssSource":"vendor","slug":"CVE-2026-47683","body":"## Overview\n\nvm2 is an open source vm/sandbox for Node.js. Prior to 3.11.6, the bufferAllocLimit enforcement in lib/setup-sandbox.js does not cover Buffer.concat(list, totalLength) or Buffer.from(arrayLike) with an attacker-controlled length, allowing sandbox code to perform large synchronous host external-memory allocations that bypass the configured cap and can exhaust the host process. This issue is fixed in version 3.11.6.\n\n## Remediation\n\nRefer to the linked advisories for vendor-supplied fixes and affected version ranges.\n\n## Package advisory (CVE-2026-47683)\n\nAffected packages:\n\n- `vm2 <= 3.11.5`\n\nPatched in:\n\n- `vm2 3.11.6`\n\nSource: https://github.com/advisories/GHSA-gmc2-2x9w-cgh9\n\n## Vendor advisories\n\n- **Red Hat VEX** · Important · affected: Red Hat Developer Hub, Self-service automation portal 2 · no fix planned: Red Hat Developer Hub, Self-service automation portal 2 · updated 2026-09-18 · [vex](https://security.access.redhat.com/data/csaf/v2/vex/2026/cve-2026-47683.json)","depth":"twilight","depthScore":41,"depthScoreParts":{"impact":41.3,"likelihood":0.1,"exploitation":0,"ransomware":0},"changes":[{"seq":206979,"id":"CVE-2026-47683","ts":1789749729958,"field":"cvss","old":null,"new":"7.5"}]}