vm2: Transformer Fast-Path Bypass Exposes Internal State Variable_CVE-2026-44003

5.3 / 10

MEDIUM

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

Description

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.

Basic Information

ID CVE-2026-44003

Source GitHub_M

Published May 13, 2026 at 17:30

Affected Product

Vendor patriksimek

Product vm2

Version < 3.11.0

Affected Versions patriksimek vm2 < 3.11.0

CWE Classification

CWE-693

References

github.com /patriksimek/vm2/security/advisories/GHSA-wp5r-2gw5-m7q7

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    "published": "2026-05-13T17:30:38.883Z",
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