CVE-2026-26956 CRITICAL

CVE-2026-26956: vm2: WASM Sandbox Escape (Node 25 only)

Vendor Patriksimek
Product vm2
Weakness CWE-693
Published May 4, 2026
Last update June 30, 2026
View on NVD All CVEs

CVSS base score

9.8/10
Attack vector Network
Attack complexity Low
Privileges required None
User interaction None
Confidentiality High
Integrity High

CVSS vector

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

What the vulnerability does

01Description

vm2 is an open source vm/sandbox for Node.js. In version 3.10.4, vm2 is vulnerable to full sandbox escape with arbitrary code execution. Attacker code inside VM.run() obtains host process object and runs host commands with zero host cooperation. This issue has been patched in version 3.10.5.

Key dates

02Disclosure timeline

May 4, 2026 CVE published
June 30, 2026 Record updated