CVE-2026-43998

high

Description

vm2 is an open source vm/sandbox for Node.js. In 3.10.5, NodeVM's require.root path restriction can be bypassed using filesystem symlinks, allowing sandboxed code to load modules from outside the allowed root directory in host context. Because path validation uses path.resolve() (which does not dereference symlinks) but module loading uses Node's native require() (which does), an attacker can load arbitrary host-realm modules and achieve remote code execution. This vulnerability is fixed in 3.11.0.

References

https://security.access.redhat.com/data/csaf/v2/vex/2026/cve-2026-43998.json

https://github.com/patriksimek/vm2/security/advisories/GHSA-cp6g-6699-wx9c

https://bugzilla.redhat.com/show_bug.cgi?id=2477206

https://access.redhat.com/security/cve/CVE-2026-43998

Details

Source: Mitre, NVD

Published: 2026-05-13

Updated: 2026-06-30

Risk Information

CVSS v2

Base Score: 7.1

Vector: CVSS2#AV:N/AC:H/Au:S/C:C/I:C/A:C

Severity: High

CVSS v3

Base Score: 8.5

Vector: CVSS:3.1/AV:N/AC:H/PR:L/UI:N/S:C/C:H/I:H/A:H

Severity: High

EPSS

EPSS: 0.00199