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CVE-2026-93604— vm2 3.11.8 Sandbox Escape via crypto.setFips

Quick assessment

Affected
patriksimek vm2
Exploitation
No confirmed in-the-wild exploitation; assess based on exposure
Recommended action
Check the vendor advisory and references for a fixed version. If immediate upgrade is impossible, restrict exposure and increase monitoring.

vm2 through 3.12.0 exposes Node.js's crypto.setFips() function to untrusted guest code when an embedder explicitly allowlists the crypto builtin for a NodeVM (require.builtin: ['crypto']). The builtin sanitizer (sanitizeCryptoModule in lib/builtin.js) replaces

CVSS 7.2 · High
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I. Basic Information for CVE-2026-93604

Vulnerability Information
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Vulnerability Title
vm2 3.11.8 Sandbox Escape via crypto.setFips
Source: CVE Program / CVE List V5
Vulnerability Description
vm2 through 3.12.0 exposes Node.js's crypto.setFips() function to untrusted guest code when an embedder explicitly allowlists the crypto builtin for a NodeVM (require.builtin: ['crypto']). The builtin sanitizer (sanitizeCryptoModule in lib/builtin.js) replaces crypto.setEngine but leaves crypto.setFips callable, and the readonly wrapper used to expose the host module does not localize side effects of forwarded host functions. Guest code can therefore call crypto.setFips() to change the FIPS mode of the entire host process; the modified mode is subsequently observed by trusted host code (crypto.getFips() changed from 0 to 1 in the reported test), crossing the NodeVM isolation boundary. Fixed in vm2 3.12.1.
Source: CVE Program / CVE List V5
CVSS Information
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:C/C:N/I:L/A:L
Source: CVE Program / CVE List V5
Vulnerability Type
访问控制不恰当
Source: CVE Program / CVE List V5

Affected Products

Vendor Product Affected Versions CPE Subscribe
patriksimek vm2 0 ~ 3.12.1 -

II. Public POCs for CVE-2026-93604

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III. Intelligence Information for CVE-2026-93604

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Other References for CVE-2026-93604 (2)

Same Patch Batch · patriksimek · 2026-09-18 · 4 CVEs total

CVE-2026-93603 10.0 CRITICAL vm2 before 3.12.1 Sandbox Escape RCE via Non-Strict Host Function
CVE-2026-93605 10.0 CRITICAL vm2 NodeVM before 3.12.1 Remote Code Execution via child_process
CVE-2026-93606 10.0 CRITICAL vm2 before 3.12.1 Sandbox Escape via Promise Symbol.species

IV. Related Vulnerabilities

Same product: vm2
Same vendor: patriksimek
Same weakness: CWE-284

V. Comments for CVE-2026-93604

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