critical10.0
CVE-2026-44005
vm2: Mutable Proxies for Host Intrinsic Prototypes Allows Sandbox Escape
Impact
vm2 is an open source vm/sandbox for Node.js. From 3.9.6 to 3.10.5, vm2's bridge exposes mutable proxies for real host-realm intrinsic prototypes and then forwards sandbox writes into the underlying host objects with otherReflectSet() and otherReflectDefineProperty(), which lets attacker-controlled JavaScript running in a default VM or inherited NodeVM mutate shared host Object.prototype, Array.prototype, and Function.prototype from inside the sandbox This vulnerability is fixed in 3.11.0.
Affected packages
| Ecosystem | Package | Affected | Fixed in |
|---|---|---|---|
| npm | vm2 | >= 3.9.6, <= 3.10.5 | 3.11.0 |
Affected products
| Vendor | Product | Affected versions |
|---|---|---|
| Vm2 Project | Vm2 | from 3.9.6 before 3.11.0 |
Weakness classification
References
- NVD record
- CVE.org record
- GitHub advisory
- https://github.com/advisories/GHSA-vwrp-x96c-mhwq
- https://github.com/patriksimek/vm2/security/advisories/GHSA-vwrp-x96c-mhwq
- https://github.com/patriksimek/vm2/releases/tag/v3.11.0
- https://nvd.nist.gov/vuln/detail/CVE-2026-44005
- https://access.redhat.com/errata/RHSA-2026:50850
- https://access.redhat.com/security/cve/CVE-2026-44005
- https://bugzilla.redhat.com/show_bug.cgi?id=2477205
- https://security.access.redhat.com/data/csaf/v2/vex/2026/cve-2026-44005.json