CVE-2026-44005
Critical · CVSS 10.0vm2 — Prototype Pollution via Sandbox Escape / Code Injection
- CVSS
- 10.0
- nvd
- EPSS
- 0.83%
- 54th pct
- KEV
- No
- Class
- oss containerizable
- CWE-94, CWE-1321, CWE-653
Description
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.
Search profile — drives PoC discovery
Symbols otherReflectSetotherReflectDefinePropertyObject.prototypeArray.prototypeFunction.prototypebridgeVMNodeVMmutable proxieshost-realm intrinsic prototypes
Keywords CVE-2026-44005vm2 sandbox escapevm2 prototype pollutionvm2 bridge proxyvm2 otherReflectSetvm2 otherReflectDefinePropertyvm2 host prototype mutationGHSA-vwrp-x96c-mhwqvm2 3.9.6 3.10.5vm2 NodeVM escapevm2 poc
Versions: 3.9.6 to 3.10.5
Affected packages
| npm | vm2 | 3.9.6 → 3.11.0 |
References
- https://github.com/patriksimek/vm2/security/advisories/GHSA-vwrp-x96c-mhwq
- 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://github.com/patriksimek/vm2/security/advisories/GHSA-vwrp-x96c-mhwq
- https://security.access.redhat.com/data/csaf/v2/vex/2026/cve-2026-44005.json
Status: enriched · ingested 2026-06-30T06:00:22.000Z · profiled 2026-07-01T12:30:14.000Z