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CVE-2026-44008 is a critical sandbox escape vulnerability in vm2, the Node.js VM/sandbox library. In versions prior to 3.11.2, the method neutralizeArraySpeciesBatch incorrectly handles objects crossing the sandbox boundary. Specifically, it can operate on objects from the opposite side while still allowing invocation back into the host side through a getter on the array prototype. This cross-boundary getter invocation can expose host-side objects inside the sandbox and allow recovery of the host Function object. Once the host Function constructor is obtained, untrusted code running inside vm2 can break out of the sandbox and execute arbitrary commands in the host environment.
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What it means. What to do now. Patch path, mitigations, and the assume-compromise checklist.
What an attacker gets, and what they’ve been doing with it.
If you can’t patch tonight, do this now.
Patch, then assume compromise.
No public exploits tracked yet. Mallory keeps watching.
No public exploit code observed for this vulnerability.
Products and vendors Mallory has correlated with this vulnerability. Open in Mallory to drill down to specific CPE configurations and version ranges.
Vendor-confirmed product mapping. Mallory continuously reconciles this list against your asset inventory.
11 sources tracked across advisories, community write-ups, and news. New activity surfaces here as Mallory finds it.
A vm2 sandbox escape CVE mentioned only as part of a historical list.
A prior vm2 sandbox escape vulnerability listed in the security history.
A sandbox escape vulnerability in vm2 for Node.js that allows attackers to obtain host objects and the host Function object, leading to arbitrary command execution on the host system.
Critical vm2 sandbox escape vulnerability in neutralizeArraySpeciesBatch() that can enable remote code execution on the host environment.
Query your assets running an affected version, and investigate the blast radius.
Every observed campaign linking this CVE to a named adversary.
Malware families riding this exploit, with evidence and IOCs.
YARA, Sigma, Snort, and vendor rules, auto-deployed to your SIEM.
Cross-references every affected SKU, including bundled OEM variants.
Community discussion across Reddit, Mastodon, and other social sources.