vm2 Promise @@species sandbox escape
CVE-2023-37466 is a critical sandbox escape vulnerability in the vm2 Node.js sandbox library affecting versions up to and including 3.9.19. The flaw is in vm2's sanitization of Promise handlers: the Promise handler sanitization can be bypassed via the @@species accessor property (Symbol.species). An attacker who can execute JavaScript inside the vm2 sandbox can abuse Promise species handling to escape the sandbox boundary and execute arbitrary code outside the intended isolated context. The issue is described as enabling arbitrary code execution in the context of the vm2 sandbox and leading to remote code execution on the underlying host/application context using vm2.
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Impact, mitigation & remediation
What it means. What to do now. Patch path, mitigations, and the assume-compromise checklist.
Impact
What an attacker gets, and what they’ve been doing with it.
Mitigation
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Remediation
Patch, then assume compromise.
Exploits
No public exploits tracked yet. Mallory keeps watching.
No public exploit code observed for this vulnerability.
Affected products & vendors
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.
Recent activity
11 sources tracked across advisories, community write-ups, and news. New activity surfaces here as Mallory finds it.
A previously patched vm2 sandbox escape vulnerability referenced as the flaw bypassed by CVE-2026-24120.
An earlier vm2 vulnerability whose fix was insufficient, enabling bypass that led to the newer sandbox escape issue.
A prior vm2 sandbox escape vulnerability whose patch was incomplete, enabling the later bypass tracked as CVE-2026-24120.
A previously disclosed vm2 sandbox escape vulnerability referenced as part of a history of similar issues.
The version that knows your 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.