{"id":"CVE-2026-44004","title":"vm2 is an open source vm/sandbox for Node.js","summary":"vm2 is an open source vm/sandbox for Node.js. Prior to 3.11.0, sandboxed code can call Buffer.alloc() with an arbitrary size to allocate memory directly on the host heap. Because Buffer.alloc is a synchronous C++ native call, vm2's timeo…","severity":"high","cvss":7.5,"cvssVector":"CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H","cwe":["CWE-770","CWE-1285"],"vendor":"vm2_project","product":"vm2","affected":["vm2 < 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-2026-44004","references":[{"url":"https://github.com/patriksimek/vm2/security/advisories/GHSA-6785-pvv7-mvg7","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-2026-44004","label":"0b0ca135-0b70-47e7-9f44-1890c2a1c46c"},{"url":"https://bugzilla.redhat.com/show_bug.cgi?id=2477195","label":"0b0ca135-0b70-47e7-9f44-1890c2a1c46c"},{"url":"https://github.com/patriksimek/vm2/security/advisories/GHSA-6785-pvv7-mvg7","label":"134c704f-9b21-4f2e-91b3-4a467353bcc0"},{"url":"https://security.access.redhat.com/data/csaf/v2/vex/2026/cve-2026-44004.json","label":"0b0ca135-0b70-47e7-9f44-1890c2a1c46c"}],"tags":["nvd"],"epss":0.00419,"epssPercentile":0.35839,"ingestedAt":"2026-08-06T13:59:37.799Z","slug":"CVE-2026-44004","body":"## Overview\n\nvm2 is an open source vm/sandbox for Node.js. Prior to 3.11.0, sandboxed code can call Buffer.alloc() with an arbitrary size to allocate memory directly on the host heap. Because Buffer.alloc is a synchronous C++ native call, vm2's timeout option cannot interrupt it. A single request can exhaust host memory and crash the process with a FATAL ERROR: Reached heap limit. This vulnerability is fixed in 3.11.0.\n\n## Affected\n\n- `vm2 < 3.11.0`\n\n## Remediation\n\nUpgrade past the affected range:\n\n- `vm2 3.11.0`","depth":"twilight","depthScore":41,"depthScoreParts":{"impact":41.3,"likelihood":0.1,"exploitation":0,"ransomware":0},"changes":[]}