high8.5
CVE-2026-43998
vm2 has a NodeVM require.root bypass via symlink traversal that allows sandbox escape
Impact
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.
Affected packages
| Ecosystem | Package | Affected | Fixed in |
|---|---|---|---|
| npm | vm2 | = 3.10.5 | 3.11.0 |
Affected products
| Vendor | Product | Affected versions |
|---|---|---|
| Vm2 Project | Vm2 | Version 3.10.5 |
Weakness classification
References
- NVD record
- CVE.org record
- GitHub advisory
- https://github.com/advisories/GHSA-cp6g-6699-wx9c
- https://github.com/patriksimek/vm2/security/advisories/GHSA-cp6g-6699-wx9c
- https://github.com/patriksimek/vm2/releases/tag/v3.11.0
- https://nvd.nist.gov/vuln/detail/CVE-2026-43998
- https://access.redhat.com/errata/RHSA-2026:50850
- https://access.redhat.com/security/cve/CVE-2026-43998
- https://bugzilla.redhat.com/show_bug.cgi?id=2477206
- https://security.access.redhat.com/data/csaf/v2/vex/2026/cve-2026-43998.json