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Advisory record · GHSA-gjq8-xm47-88rc

vm2: Host-returned Promise rejection can bypass vm2's unhandled-rejection hardening and terminate the host process

CVSS 9.2 CriticalCriticalEPSS 0.0049 · 42nd percentile

Critical, because:

  • CVSS score 9.2: 9.0 or more.

How we decide what’s critical

Published by the GitHub Advisory Database at 5 Oct 2026, 22:45 UTC. agentprime has not analysed this yet, so whether it affects any app is not known.

PackageEcosystemAffectedFixed in
vm2npm>=3.10.0, <3.11.83.11.8
Identifiers
GHSA-gjq8-xm47-88rc · CVE-2026-92954
Weakness (CWE)
CWE-248 · CWE-703
Tags
Published
5 Oct 2026
Updated
5 Oct 2026

Machine-written summary

Summary written by Claude Haiku from the source advisory. Not reviewed by a person.

Affected: the vm2 sandbox library, versions >=3.10.0 and <3.11.8. An attacker who can run code inside a vm2 sandbox can call a host function that returns a rejected Promise and ignore the result, which leaves the host Promise unhandled and terminates the host Node.js process; the reporter also describes a NodeVM variant using the events builtin. Upgrade to vm2 3.11.8, which is the listed fixed version.

Written 31 Oct 2026.

Not analysed yet

We haven’t published our analysis of this Advisory yet. Once a person has reviewed it, this page will say what’s vulnerable, what has to be true for your app to be affected, and how to check.

Severity and exploitation

ScoreRatingCVSSVectorSource
9.2 Critical 4.0 CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:N/VI:N/VA:H/SC:N/SI:N/SA:H CNA (VulnCheck)
  • CISA KEV Not listed.
  • EPSS 0.0049, the 42nd percentile, on 5 Nov 2026: FIRST’s estimate of the chance of exploitation in the next 30 days.

Timeline

  1. 31 Oct 2026, 13:34 UTC First seen by agentprime
  2. 31 Oct 2026, 13:34 UTC Confirmed by OSV

Sources

Facts on this page come from the GitHub Advisory Database (CC-BY 4.0), OSV and the other sources listed, as published. We don’t reproduce full advisory descriptions, which can contain exploit code.