vulnerability · Mon 05 Oct 2026 · 22:45 UTC
GHSA-gjq8-xm47-88rc: vm2: Host-returned Promise rejection can bypass vm2's unhandled-rejection hardening and terminate the host
Filed UTCSource GTH ↗
vm2 current head (v3.11.5, commit 7a1f5100b96f48d34e0fe104ab37c0acc5944f92) can still be used to terminate the host Node.js process when sandbox code calls a host-realm function that returns a rejected host Promise and then ignores the returned value. This is an incomplete-fix variant of the GHSA-hw58-p9xv-2mjh unhandled rejection hardening. The localPromise constructor now catches and consumes sandbox-created unhandled rejections, but host Promises returned across the bridge are not marked handled at the bridge boundary. If the sandbox does not attach .catch() or `.then(.
Signals
as the pipeline stamped them- High
- Critical vulnerability — CVSS 8.6
- What to do
- Critical severity — schedule an urgent patch.
CVE
KEV from CISA · EPSS from FIRST| Id | KEV | EPSS | Reference |
|---|---|---|---|
| CVE-2026-92954 | — | 0.49% | NVD ↗ |
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