VulnerabilityAnalyzed

CVE-2026-22709

In vm2 prior to version 3.10.2, `Promise.prototype.then` `Promise.prototype.catch` callback sanitization can be bypassed.

CRITICAL 10.0EPSS 1.24%

Does this matter?

High impact if exploited, but EPSS currently rates exploitation as unlikely (1.24%). Schedule it in the normal patch cycle and watch for a rise in EPSS or a public exploit.

Description

vm2 is an open source vm/sandbox for Node.js. In vm2 prior to version 3.10.2, `Promise.prototype.then` `Promise.prototype.catch` callback sanitization can be bypassed. This allows attackers to escape the sandbox and run arbitrary code. In lib/setup-sandbox.js, the callback function of `localPromise.prototype.then` is sanitized, but `globalPromise.prototype.then` is not sanitized. The return value of async functions is `globalPromise` object. Version 3.10.2 fixes the issue.

CVSS 3.1: 10.0 CRITICALCVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:C/C:H/I:H/A:H
EPSS: 1.24% probability · 68th percentile
CISA KEV: Not listed
Weakness: CWE-94, CWE-693, CWE-913
Affected: vm2 project/vm2
Source: security-advisories@github.com

References

https://github.com/patriksimek/vm2/commit/4b009c2d4b1131c01810c1205e641d614c322a29Patch
https://github.com/patriksimek/vm2/releases/tag/v3.10.2Product, Release Notes
https://github.com/patriksimek/vm2/security/advisories/GHSA-99p7-6v5w-7xg8Exploit, Vendor Advisory

Source: NVD record, EPSS from FIRST.org, KEV from CISA. Refreshed daily.