Protection Mechanism Failure Affecting vm2 package, versions <3.12.1
Threat Intelligence
Snyk has a proof-of-concept or detailed explanation of how to exploit this vulnerability.
The probability is the direct output of the EPSS model, and conveys an overall sense of the threat of exploitation in the wild. The percentile measures the EPSS probability relative to all known EPSS scores. Note: This data is updated daily, relying on the latest available EPSS model version. Check out the EPSS documentation for more details.
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Test your applications- Snyk IDSNYK-JS-VM2-20044269
- published22 Sept 2026
- disclosed18 Sept 2026
- creditRex Liu, Jace
Introduced: 18 Sep 2026
NewCVE-2026-93604 (opens in a new tab)How to fix?
Upgrade vm2 to version 3.12.1 or higher.
Overview
vm2 is a sandbox that can run untrusted code with whitelisted Node's built-in modules.
Affected versions of this package are vulnerable to Protection Mechanism Failure via sanitizeCryptoModule in lib/builtin.js, where a NodeVM that allowlists the crypto builtin exposes crypto.setFips through a read-only wrapper that blocks property writes but forwards host calls with full authority. Guest code inside the sandbox can invoke crypto.setFips() to flip the FIPS mode of the entire host process, mutating process-wide cryptographic configuration that is subsequently observed by trusted host code. This is the same process-wide-mutator class as crypto.setEngine, which was already neutralized in the same function.