CVE-2026-43997
Critical · CVSS 10.0vm2 — Sandbox Escape via Host Object Access (Code Injection)
- CVSS
- 10.0
- nvd
- EPSS
- 0.98%
- 59th pct
- KEV
- No
- Class
- oss containerizable
- CWE-94, CWE-653
Description
vm2 is an open source vm/sandbox for Node.js. Prior to 3.11.0, it is possible to obtain the host Object. There are various ways to use the host Object, to escape the sandbox, one example would be using HostObject.getOwnPropertySymbols to obtain Symbol(nodejs.util.inspect.custom). This vulnerability is fixed in 3.11.0.
Search profile — drives PoC discovery
Symbols HostObject.getOwnPropertySymbolsSymbol(nodejs.util.inspect.custom)getOwnPropertySymbolsnodejs.util.inspect.customhost Objectvm2 sandbox escape
Keywords CVE-2026-43997vm2 sandbox escapevm2 host objectvm2 getOwnPropertySymbolsvm2 nodejs.util.inspect.customvm2 3.11.0patriksimek vm2GHSA-47x8-96vw-5wg6vm2 RCE escapevm2 Node.js sandbox bypass
Versions: < 3.11.0
Ranked PoCs (1) — best first
Heuristic ranking — not yet expert-vetted. Scored on structure + provenance, not execution.
- ★ 0
Recall-favoring discovery; ranking by the Stage-4 scorer (Adam's rubric). Scanner/aggregator repos are hidden.
Affected packages
| npm | vm2 | 0 → 3.11.0 |
References
- https://github.com/patriksimek/vm2/security/advisories/GHSA-47x8-96vw-5wg6
- https://access.redhat.com/errata/RHSA-2026:50850
- https://access.redhat.com/security/cve/CVE-2026-43997
- https://bugzilla.redhat.com/show_bug.cgi?id=2477203
- https://github.com/patriksimek/vm2/security/advisories/GHSA-47x8-96vw-5wg6
- https://security.access.redhat.com/data/csaf/v2/vex/2026/cve-2026-43997.json
Status: enriched · ingested 2026-06-30T06:00:22.000Z · profiled 2026-07-01T12:30:14.000Z