vm2 Promise Species Sandbox Escape
CVE-2026-47208 is a sandbox breakout vulnerability in vm2, the Node.js sandbox library, affecting versions prior to 3.11.4. According to the provided content, the flaw is caused by vm2 failing to clear promise constructor species definitions after changes to localPromise handling. By supplying a custom Promise with a fabricated rejection path, an attacker can cause vm2 to expose a raw host-originated error object to attacker-controlled code. Access to that host object can then be leveraged to escape the sandbox boundary and execute arbitrary commands on the host system.
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Impact, mitigation & remediation
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Impact
What an attacker gets, and what they’ve been doing with it.
Mitigation
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Remediation
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Exploits
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No public exploit code observed for this vulnerability.
Recent activity
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A sandbox breakout vulnerability in vm2 for Node.js that allows attackers to escape the VM2 sandbox and execute arbitrary commands on the host system. It affects versions prior to 3.11.4.
A critical vm2 sandbox escape caused by improper handling of Promise species definitions, enabling extraction of host error objects and remote code execution.
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.