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  5. CVE-2026-44003

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

May 7, 2026

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

  • github.com/advisories/GHSA-wp5r-2gw5-m7q7
  • github.com/patriksimek/vm2
  • github.com/patriksimek/vm2/releases/tag/v3.11.0
  • github.com/patriksimek/vm2/security/advisories/GHSA-wp5r-2gw5-m7q7
  • nvd.nist.gov/vuln/detail/CVE-2026-44003

Code Behaviors & Features

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Affected versions

All versions before 3.11.0

Fixed versions

  • 3.11.0

Solution

Upgrade to version 3.11.0 or above.

Impact 5.3 MEDIUM

CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:L/I:N/A:N

Learn more about CVSS

Weakness

  • CWE-693: Protection Mechanism Failure

Source file

npm/vm2/CVE-2026-44003.yml

Spotted a mistake? Edit the file on GitLab.

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