Review reviewCritical

CVE-2026-44005

patriksimek vm2, Red Hat Developer Hub, Self-service automation portal 2

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: 10
EPSS: 0.83%
CISA KEV: Not listed
Published: 2026.05.14

PRIORITY ASSESSMENT

Review review

The CVSS severity warrants an early asset and exposure review.

Known exploitationNot established by KEV

Exploit probability0.83%

Technical severityCVSS 10

Vulnerability overview

Affected product and versions

Product: patriksimek vm2, Red Hat Developer Hub, Self-service automation portal 2
Affected versions: >= >= 3.9.6, < 3.11.0, >= 3.9.6 < 3.11.0
Fixed versions: 3.11.0

Recommended response sequence

Confirm exposure before applying a vendor-supported change.

Full remediation guide

1
Identify
Confirm that patriksimek vm2, Red Hat Developer Hub, Self-service automation portal 2 and an affected version are present.
2
Prioritize
Combine exploitation signals with asset exposure and business criticality.
3
Remediate
Follow the vendor advisory or supported update path and preserve rollback options.
4
Verify
Recheck the version, service health, access paths, and relevant logs.

Technical data

CVSS vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:C/C:N/I:H/A:H
CWE: CWE-1321, CWE-653, CWE-94