Improper Control of Dynamically-Managed Code Resources in vm2 - CVE-2026-93603
Published: September 4, 2026 / Updated: September 22, 2026
Vulnerability identifier: #VU146897
CSH Severity: High
CVSS v4: 9.3 [CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:H/VI:H/VA:H/SC:N/SI:N/SA:N]
CVE-ID: CVE-2026-93603
CWE-ID: CWE-913
Exploitation vector: Remote access
Exploit availability:
No public exploit available
Vulnerability details
The vulnerability allows a remote attacker to execute arbitrary code on the host.
The vulnerability exists due to improper handling of nullish this receivers in the BaseHandler apply trap in lib/bridge.js when sandboxed code invokes an exposed non-strict host function without a receiver. A remote attacker can invoke the function to obtain the host global object and execute commands on the host.
Exploitation requires the embedder to expose a non-strict host function to the sandbox; strict-mode and ESM functions are unaffected.
Affected software
vm2
How to mitigate CVE-2026-93603
Install security update from vendor's website.
vm2 - update to 3.12.1