CVE-2026-44003

CVE-2026-44003 · vm2: Transformer Fast-Path Bypass Exposes Internal State Variable

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vm2 is an open source vm/sandbox for Node.js. Prior to 3.11.0, vm2's code transformer has a performance optimization that skips AST analysis when the code does not contain catch, import, or async keywords. This fast-path bypass allows sandboxed code to directly access the internal VM2_INTERNAL_STATE_DO_NOT_USE_OR_PROGRAM_WILL_FAIL variable, which exposes internal security functions (handleException, wrapWith, import). This vulnerability is fixed in 3.11.0.

CVSS 5.3 · Medium · EPSS 0.4% · Fix available

Published

2026-05-13T17:30:38.883Z

Updated

2026-05-13T18:41:25.611Z

Stack: node

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