Vulnerability · Published May 13, 2026 · Assigned by GitHub_M

CVE-2026-44001vm2: Sandbox Escape via Promise Constructor Unhandled Rejection (Process Crash DoS)

High 8.6

In plain English

A high-severity security flaw in vm2 from patriksimek. Proof-of-concept exploit code is public. The chance it is exploited in the next 30 days is estimated at 0.4% (higher than 39% of all known vulnerabilities). Fixed versions are available - upgrade the affected package.

Severity (CVSS 3.1)8.6High

Exploit odds (30 days)0.4%top 60.9% of all CVEs

Exploited in the wildNo reportsCISA SSVC: poc

Attack toolingNoneno public tooling known

Official description

vm2 is an open source vm/sandbox for Node.js. Prior to 3.11.0, a sandbox escape vulnerability in vm2 v3.10.5 allows any sandboxed code to crash the host Node.js process via a single Promise constructor that triggers an unhandled rejection propagating to the host. The fix for CVE-2026-22709 (v3.10.2) only sanitized the onRejected callback in .then() and .catch() overrides and did not address the executor-to-unhandledRejection path. This vulnerability is fixed in 3.11.0.

Affected packages & fixed versions

Ecosystem	Package	Fixed in	Advisory
npm	vm2	3.11.0	GHSA-hw58-p9xv-2mjh

Affected products (as reported)

Vendor	Product	Versions
patriksimek	vm2	< 3.11.0

Weakness: CWE-248 · Vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:C/C:N/I:N/A:H

References

https://github.com/patriksimek/vm2/security/advisories/GHSA-hw58-p9xv-2mjh x_refsource_CONFIRM
https://access.redhat.com/security/cve/CVE-2026-44001 vdb-entry, x_refsource_REDHAT
RHBZ#2477208 issue-tracking, x_refsource_REDHAT
https://security.access.redhat.com/data/csaf/v2/vex/2026/cve-2026-44001.json x_sadp-csaf-vex
https://access.redhat.com/errata/RHSA-2026:50850 vendor-advisory, x_refsource_REDHAT