{"id":"CVE-2026-44005","title":"vm2 is an open source vm/sandbox for Node.js","summary":"vm2 is an open source vm/sandbox for Node.js. From 3.9.6 to 3.10.5, vm2's bridge exposes mutable proxies for real host-realm intrinsic prototypes and then forwards sandbox writes into the underlying host objects with otherReflectSet() an…","severity":"critical","cvss":10,"cvssVector":"CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:C/C:N/I:H/A:H","cwe":["CWE-94","CWE-1321","CWE-653"],"vendor":"vm2_project","product":"vm2","affected":["vm2 >= 3.9.6, < 3.11.0"],"patched":["vm2 3.11.0"],"published":"2026-05-13","updated":"2026-08-06","source":"NVD","sourceUrl":"https://nvd.nist.gov/vuln/detail/CVE-2026-44005","references":[{"url":"https://github.com/patriksimek/vm2/security/advisories/GHSA-vwrp-x96c-mhwq","label":"security-advisories@github.com"},{"url":"https://access.redhat.com/errata/RHSA-2026:50850","label":"0b0ca135-0b70-47e7-9f44-1890c2a1c46c"},{"url":"https://access.redhat.com/security/cve/CVE-2026-44005","label":"0b0ca135-0b70-47e7-9f44-1890c2a1c46c"},{"url":"https://bugzilla.redhat.com/show_bug.cgi?id=2477205","label":"0b0ca135-0b70-47e7-9f44-1890c2a1c46c"},{"url":"https://github.com/patriksimek/vm2/security/advisories/GHSA-vwrp-x96c-mhwq","label":"134c704f-9b21-4f2e-91b3-4a467353bcc0"},{"url":"https://security.access.redhat.com/data/csaf/v2/vex/2026/cve-2026-44005.json","label":"0b0ca135-0b70-47e7-9f44-1890c2a1c46c"}],"tags":["nvd"],"epss":0.00831,"epssPercentile":0.55614,"ingestedAt":"2026-08-06T13:59:37.831Z","slug":"CVE-2026-44005","body":"## Overview\n\nvm2 is an open source vm/sandbox for Node.js. From 3.9.6 to 3.10.5, vm2's bridge exposes mutable proxies for real host-realm intrinsic prototypes and then forwards sandbox writes into the underlying host objects with otherReflectSet() and otherReflectDefineProperty(), which lets attacker-controlled JavaScript running in a default VM or inherited NodeVM mutate shared host Object.prototype, Array.prototype, and Function.prototype from inside the sandbox This vulnerability is fixed in 3.11.0.\n\n## Affected\n\n- `vm2 >= 3.9.6, < 3.11.0`\n\n## Remediation\n\nUpgrade past the affected range:\n\n- `vm2 3.11.0`","depth":"midnight","depthScore":55,"depthScoreParts":{"impact":55,"likelihood":0.2,"exploitation":0,"ransomware":0},"changes":[]}