CVE-2026-93603 vm2 - Sandbox Escape

vm2 <= 3.12.0 contains a sandbox escape caused by improper handling of nullish `this` receiver in the apply trap of its bridge, letting sandboxed code execute arbitrary commands on the host, exploit requires exposure of non-strict host functions.

CVSS base score 10.0 /10
Critical
CISA KEV
Not listed
Public exploit
None known
Authentication
Not required
EPSS
0.73% chance of exploitation in 30 days
View the NVD record ↗

Details

Type
Sandbox Escape
Impact
Remote Code Execution
CVSS vector
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:C/C:H/I:H/A:H
Published
18 September 2026
Updated
15 October 2026
Weakness
CWE-94

Vendor fix

Upgrade to version 3.12.1 or later.

Patching closes this CVE. It does not tell you which of your systems run the affected version, or what else is exposed alongside them.

References

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