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CVE

CVE-2026-43999

vm2: NodeVM builtin allowlist bypass via `module` builtin's `Module._load` allows sandbox escape
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CVE

CVE-2026-43999

vm2: NodeVM builtin allowlist bypass via `module` builtin's `Module._load` allows sandbox escape

vm2 is an open source vm/sandbox for Node.js. Prior to 3.11.0, NodeVM's builtin allowlist can be bypassed when the module builtin is allowed (including via the '*' wildcard). The module builtin exposes Node's Module.load(), which loads any module by name directly in the host context, completely bypassing vm2's builtin restriction. This allows sandboxed code to load excluded builtins like childprocess and achieve remote code execution. This vulnerability is fixed in 3.11.0.

Package Versions Affected

Package Version
patch Availability
No items found.

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CVSS Version

Severity
Base Score
CVSS Version
Score Vector
C
H
U
9.9
-
3.1
CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:C/C:H/I:H/A:H
C
H
U
0
-
3.1
CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:C/C:H/I:H/A:H
C
H
U
-

Related Resources

No items found.

References

https://security.access.redhat.com/data/csaf/v2/vex/2026/cve-2026-43999.json, https://access.redhat.com/errata/RHSA-2026:50850, https://access.redhat.com/security/cve/CVE-2026-43999, https://github.com/CVEProject/cvelistV5/tree/main/cves/2026/43xxx/CVE-2026-43999.json, https://github.com/patriksimek/vm2/security/advisories/GHSA-947f-4v7f-x2v8, https://nvd.nist.gov/vuln/detail/CVE-2026-43999, https://bugzilla.redhat.com/show_bug.cgi?id=2477196

Severity

9.9

CVSS Score
0
10

Basic Information

Base CVSS
9.9
EPSS Probability
0.00974%
EPSS Percentile
0.60551%
Introduced Version
0
Fix Available
fca270df73b64a88e2f9ce71ac17663b6eaf814e

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