CVE-2026-100723 vm2 - Memory Corruption & Information Disclosure

vm2 before 3.12.2 contains a buffer ownership invariant bypass caused by improper handling of Buffers from host builtin modules like zlib, letting untrusted guest code read and modify host memory across sandbox boundary, exploit requires exposing Node's zlib module in NodeVM builtin allowlist.

CVSS base score 7.5 /10
High
CISA KEV
Not listed
Public exploit
None known
Authentication
Not required
EPSS
0.32% chance of exploitation in 30 days
View the NVD record ↗

Details

Type
Memory Corruption
Impact
Information Disclosure, Data Tampering
CVSS vector
CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:C/C:H/I:L/A:N
Published
27 September 2026
Updated
15 October 2026
Weakness
CWE-200

Vendor fix

Upgrade to version 3.12.2 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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