What’s Vulnerable › Vulnerabilities

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

• Severity: high (CVSS 8.6 v3.1)
• Exploited in the wild: not listed in CISA KEV
• EPSS: 0.4% probability of exploitation in the next 30 days
• Public exploit or detection template: yes
• Published: 2026-05-13 · updated 2026-10-26
• Weakness: CWE-248

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 products

• patriksimek vm2: before 3.11.0 — fixed in 3.11.0

How to fix

Upgrade to a fixed version: patriksimek vm2 3.11.0. Check the vendor advisory for mitigations.

References

• https://github.com/patriksimek/vm2/security/advisories/GHSA-hw58-p9xv-2mjh
• https://access.redhat.com/errata/RHSA-2026:50850
• https://access.redhat.com/security/cve/CVE-2026-44001
• https://bugzilla.redhat.com/show_bug.cgi?id=2477208
• https://github.com/patriksimek/vm2/security/advisories/GHSA-hw58-p9xv-2mjh
• https://security.access.redhat.com/data/csaf/v2/vex/2026/cve-2026-44001.json

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