Vulnerability · Published May 13, 2026 · Assigned by GitHub_M
CVE-2026-44009vm2: Sandbox Breakout Through Null Proto Exception
Critical 9.8
In plain English
A critical-severity security flaw in vm2 from patriksimek. Proof-of-concept exploit code is public. The chance it is exploited in the next 30 days is estimated at 1.0% (higher than 63% of all known vulnerabilities). Fixed versions are available - upgrade the affected package.
Severity (CVSS 3.1)9.8Critical
Exploit odds (30 days)1.0%top 36.6% of all CVEs
Exploited in the wildNo reportsCISA SSVC: poc
Attack toolingNoneno public tooling known
Official description
vm2 is an open source vm/sandbox for Node.js. Prior to 3.11.2, VM2 suffers from a sandbox breakout vulnerability. This allows attackers to write code which can escape from the VM2 sandbox and execute arbitrary commands on the host system. This vulnerability is fixed in 3.11.2.
Affected packages & fixed versions
| Ecosystem | Package | Fixed in | Advisory |
|---|---|---|---|
| npm | vm2 | 3.11.2 | GHSA-9vg3-4rfj-wgcm |
Affected products (as reported)
| Vendor | Product | Versions |
|---|---|---|
| patriksimek | vm2 | < 3.11.2 |
Weakness: CWE-668, CWE-653 · Vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H
References
- https://github.com/patriksimek/vm2/security/advisories/GHSA-9vg3-4rfj-wgcm x_refsource_CONFIRM
- https://github.com/patriksimek/vm2/commit/c33c2bb19a822847f4e01d8d87b28dd5b2c86b3e x_refsource_MISC
- https://access.redhat.com/errata/RHSA-2026:50850 x_refsource_MISC
- https://access.redhat.com/security/cve/CVE-2026-44009 x_refsource_MISC
- https://bugzilla.redhat.com/show_bug.cgi?id=2477185 x_refsource_MISC
- https://github.com/patriksimek/vm2/releases/tag/v3.11.2 x_refsource_MISC
- https://security.access.redhat.com/data/csaf/v2/vex/2026/cve-2026-44009.json x_refsource_MISC