CVE-2026-44003 MEDIUM

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

Vendor Patriksimek
Product vm2
Weakness CWE-693
Published May 13, 2026
Last update May 13, 2026
View on NVD All CVEs

CVSS base score

5.3/10
Attack vector Network
Attack complexity Low
Privileges required None
User interaction None
Confidentiality Low
Integrity None

CVSS vector

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

What the vulnerability does

01Description

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.

Key dates

02Disclosure timeline

May 13, 2026 CVE published
May 13, 2026 Record updated