Is CVE-2026-44004 exploited in the wild?

No. Junglewise Threat Intelligence has no report of CVE-2026-44004 being exploited in the wild.

How severe is CVE-2026-44004?

High severity, with a CVSS score of 7.5, published 13 May 2026.

Which products and versions are affected?

vm2 (npm) <= 3.10.5, SEMVER:introduced=0,fixed=3.11.0; Red Hat Self-service automation portal 2.

Is there a fix for CVE-2026-44004?

Yes. vm2 (npm): upgrade to 3.11.0 or later. Junglewise finds every place you run it, drafts the upgrade and applies it once you approve.

How is CVE-2026-44004 attacked?

It is attacked over the network, in a software library.

Am I affected by CVE-2026-44004?

Check whether you run vm2 (npm) or Red Hat Self-service automation portal 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-2026-44004: patriksimek vm2 denial of service via host memory exhaustion in Buffer.alloc

Q: Which products and versions are affected?

vm2 (npm) <= 3.10.5, SEMVER:introduced=0,fixed=3.11.0; Red Hat Self-service automation portal 2.

Q: Is there a fix for CVE-2026-44004?

Yes. vm2 (npm): upgrade to 3.11.0 or later. Junglewise finds every place you run it, drafts the upgrade and applies it once you approve.

Q: How is CVE-2026-44004 attacked?

It is attacked over the network, in a software library.

Q: Am I affected by CVE-2026-44004?

Check whether you run vm2 (npm) or Red Hat Self-service automation portal 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-2026-44004 · Severity: high · CVSS 7.5 · Published 2026-05-13

vm2 is a popular tool used to safely run untrusted code in Node.js environments. A flaw allows an attacker to bypass security limits and force the host system to allocate massive amounts of memory instantly. This can lead to a complete service crash (Denial of Service), especially in cloud environments like Docker or Kubernetes where memory is strictly limited.

Technologies: vm2 (npm), Red Hat Self-service automation portal. Vendors: npm, Red Hat.

Quick answers

Is CVE-2026-44004 exploited in the wild?: No. Junglewise Threat Intelligence has no report of CVE-2026-44004 being exploited in the wild.
How severe is CVE-2026-44004?: High severity, with a CVSS score of 7.5, published 13 May 2026.
Which products and versions are affected?: vm2 (npm) <= 3.10.5, SEMVER:introduced=0,fixed=3.11.0; Red Hat Self-service automation portal 2.
Is there a fix for CVE-2026-44004?: Yes. vm2 (npm): upgrade to 3.11.0 or later. Junglewise finds every place you run it, drafts the upgrade and applies it once you approve.
How is CVE-2026-44004 attacked?: It is attacked over the network, in a software library.
Am I affected by CVE-2026-44004?: Check whether you run vm2 (npm) or Red Hat Self-service automation portal 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 3.11.0 or later
```
npm install vm2@3.11.0
```

Technical details

A vulnerability in vm2's bridge proxy allows sandboxed code to call the native 'Buffer.alloc()' function with arbitrary size parameters. Because this is a synchronous C++ native call, it bypasses vm2's JavaScript-level timeout mechanism, which cannot interrupt the execution until the allocation completes. An attacker can trigger a massive allocation with a single request, leading to host heap exhaustion and a 'FATAL ERROR: Reached heap limit' crash. This is particularly effective in memory-constrained environments like Docker, Lambda, or Kubernetes. The issue is fixed in version 3.11.0 by validating allocation sizes.

Affected products

patriksimek vm2 < 3.11.0
Red Hat Self-service automation portal 2 2

Identifiers

CVE-2026-44004
GHSA-6785-pvv7-mvg7

Timeline

2026-05-01: advisory: GitHub advisory GHSA-6785-pvv7-mvg7 published
2026-05-13: disclosed: CVE-2026-44004 published
2026-05-13: patched: Fixed in version 3.11.0

References

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