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CVE-2026-45411 is a sandbox escape vulnerability in vm2, the Node.js virtual machine and sandbox library. It affects vm2 versions prior to 3.11.3. The flaw arises from the interaction between vm2’s sandboxing model and specification-mandated V8 behavior for async generators using yield* delegation and generator closure via return(). In the vulnerable path, when an async generator delegated with yield* is closed using return(value), the supplied value is awaited. If that value is a thenable whose then handler throws synchronously, the exception is caught by the runtime and delivered back to the delegated iterator as the next value rather than being handled through vm2’s normal sanitization and exception-handling controls. Because this exception handling occurs in native engine logic outside vm2’s JavaScript-level instrumentation, an attacker can cause host exceptions to cross the sandbox boundary and use that condition to escape the vm2 isolation model. Successful exploitation enables execution of arbitrary commands on the host system.
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A vulnerability involving V8 async generator delegation and native Await/PerformPromiseThen behavior that can evade vm2 sandbox exception and promise rejection sanitization logic.
A sandbox escape vulnerability in vm2 for Node.js that can allow arbitrary command execution on the host system via async generator and yield* exception handling behavior.
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.
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Cross-references every affected SKU, including bundled OEM variants.
Community discussion across Reddit, Mastodon, and other social sources.