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CVE-2026-44005

Vm2 code injection

10.0 CRITICALPublic exploitEPSS 0.83%
  1. Published13 May 2026

Description

vm2 is an open source vm/sandbox for Node.js. From 3.9.6 to 3.10.5, vm2's bridge exposes mutable proxies for real host-realm intrinsic prototypes and then forwards sandbox writes into the underlying host objects with otherReflectSet() and otherReflectDefineProperty(), which lets attacker-controlled JavaScript running in a default VM or inherited NodeVM mutate shared host Object.prototype, Array.prototype, and Function.prototype from inside the sandbox This vulnerability is fixed in 3.11.0.

CVSS 3.1 breakdown

Attack vectorNetwork
Attack complexityLow
Privileges requiredNone
User interactionNone
ScopeChanged
ConfidentialityNone
IntegrityHigh
AvailabilityHigh
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:C/C:N/I:H/A:H

Affected products

Vm2≥ 3.9.6 < 3.11.0

Remediation

Fixed in
Vm2≥ 3.11.0

References

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Frequently asked

Is CVE-2026-44005 being actively exploited?

CVE-2026-44005 is not in the CISA KEV catalog. A public exploit reference exists, so treat it as exploitable. Its EPSS exploit probability is 0.83%.

How severe is CVE-2026-44005?

CVE-2026-44005 has a CVSS 3.1 base score of 10.0, rated critical. EPSS estimates a 0.83% probability of exploitation.

Which products are affected by CVE-2026-44005?

Affected products include Vm2.

How do I fix CVE-2026-44005?

Upgrade affected software to a fixed version, for example Vm2 3.11.0 or later, then confirm no affected versions remain in your inventory.

How Secuno handles this

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Data from the NVD, CISA KEV catalog and FIRST EPSS. CVSS 3.1 base score shown where available.