CVE-2026-44003: vm2's Transformer Fast-Path Bypass Exposes Internal State Variable
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).
References
Code Behaviors & Features
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