Is CVE-2026-92944 exploited in the wild?

No. Junglewise Threat Intelligence has no report of CVE-2026-92944 being exploited in the wild.

How severe is CVE-2026-92944?

Critical severity, with a CVSS score of 9.8, published 17 September 2026.

Which products and versions are affected?

vm2 (npm) >= 3.10.2, <= 3.11.6, SEMVER:introduced=3.10.2,fixed=3.11.7.

Is there a fix for CVE-2026-92944?

Yes. vm2 (npm): upgrade to 3.11.7 or later. Junglewise finds every place you run it, drafts the upgrade and applies it once you approve.

How is CVE-2026-92944 attacked?

It is attacked over the network.

Am I affected by CVE-2026-92944?

Check whether you run vm2 (npm) at an affected version. Junglewise does that check for you around the clock: connect your code, cloud and domains, and it matches new vulnerabilities like this one against what you actually run and tells you when one reaches you.

CVE-2026-92944: vm2 sandbox escape via Promise.prototype.finally() on Node.js 26

Q: Which products and versions are affected?

vm2 (npm) >= 3.10.2, <= 3.11.6, SEMVER:introduced=3.10.2,fixed=3.11.7.

Q: Is there a fix for CVE-2026-92944?

Yes. vm2 (npm): upgrade to 3.11.7 or later. Junglewise finds every place you run it, drafts the upgrade and applies it once you approve.

Q: How is CVE-2026-92944 attacked?

It is attacked over the network.

Q: Am I affected by CVE-2026-92944?

Check whether you run vm2 (npm) at an affected version. Junglewise does that check for you around the clock: connect your code, cloud and domains, and it matches new vulnerabilities like this one against what you actually run and tells you when one reaches you.

CVE-2026-92944 · Severity: critical · CVSS 9.8 · Published 2026-09-17

vm2 is a sandboxing library used to safely execute untrusted JavaScript code in isolated environments. This vulnerability allows attackers to break out of the sandbox and execute arbitrary code on the host system by exploiting a flaw in how Promise chains are validated, potentially compromising any application relying on vm2 to isolate user-supplied code.

Technologies: vm2 (npm). Vendors: npm.

Quick answers

Is CVE-2026-92944 exploited in the wild?: No. Junglewise Threat Intelligence has no report of CVE-2026-92944 being exploited in the wild.
How severe is CVE-2026-92944?: Critical severity, with a CVSS score of 9.8, published 17 September 2026.
Which products and versions are affected?: vm2 (npm) >= 3.10.2, <= 3.11.6, SEMVER:introduced=3.10.2,fixed=3.11.7.
Is there a fix for CVE-2026-92944?: Yes. vm2 (npm): upgrade to 3.11.7 or later. Junglewise finds every place you run it, drafts the upgrade and applies it once you approve.
How is CVE-2026-92944 attacked?: It is attacked over the network.
Am I affected by CVE-2026-92944?: Check whether you run vm2 (npm) at an affected version. Junglewise does that check for you around the clock: connect your code, cloud and domains, and it matches new vulnerabilities like this one against what you actually run and tells you when one reaches you.

How to fix

vm2 (npm): upgrade to 3.11.7 or later
```
npm install vm2@3.11.7
```

Technical details

The vulnerability is a sandbox escape affecting vm2 versions 3.10.2 through 3.11.6 on Node.js 26. It exploits a stale PromiseThenLookupChain protector in V8 14.6 where Promise.prototype.finally() bypasses vm2's wrapper protections. An attacker can craft an async function that returns a Promise with an attacker-controlled constructor Symbol.species property, allowing them to reach the host Function constructor and process object, thereby executing arbitrary code outside the sandbox. The attack requires only the ability to execute code within the vm2 sandbox context. Patches should be available in later versions of vm2.

Affected products

vm2 vm2 3.10.2 through 3.11.6

Identifiers

CVE-2026-92944
GHSA-27g9-p43v-cw3v

Timeline

2026-09-17: disclosed

References

This page as Markdown. Free to reuse under CC BY 4.0 with a link back.