CVE-2026-92942

vm2 before 3.11.7 (affected versions <= 3.11.6) does not enforce the VM({ timeout }) option on code executed outside the synchronous VM#run() call. The timeout only wraps the single call to _runScript() via doWithTimeout() in lib/vm.js, and FinalizationRegistry and WeakRef are exposed to sandboxed code unmodified (they are not among the hardened globals in lib/setup-sandbox.js). Sandboxed code can register a FinalizationRegistry cleanup callback against an object and then drop the only strong reference to it; vm.run() returns within the configured timeout, but when the V8 garbage collector later reclaims the object it invokes the sandboxed cleanup callback outside any vm2 timeout accounting. A busy loop in that callback blocks the host event loop for an unbounded period, resulting in denial of service. The time of invocation depends on the garbage collector (e.g. under memory pressure or with --expose-gc).

CVSS v3 7.5 HIGH

7.5^/10

CVSS v3 : HIGH

Vector :

Exploitability : 3.9 / Impact : 3.6

Attack Vector NETWORK

Attack Complexity LOW

Privileges Required NONE

User Interaction NONE

Confidentiality Impact NONE

Integrity Impact NONE

Availability Impact HIGH

Scope UNCHANGED

References

Link	Resource
https://github.com/patriksimek/vm2/security/advisories/GHSA-r4fx-v8hh-22mv
https://www.vulncheck.com/advisories/vm2-before-3.11.7-timeout-bypass-via-finalizationregistry

Configurations

No configuration.

History

17 Sep 2026, 14:17

Type	Values Removed	Values Added
New CVE

Information

Published : 2026-09-17 14:17

Updated : 2026-09-17 14:17

NVD link : CVE-2026-92942

Mitre link : CVE-2026-92942

CVE.ORG link : CVE-2026-92942

JSON object : View

Products Affected

No product.

CWE

CWE-400

Uncontrolled Resource Consumption

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