CVE-2026-44001: CWE-248: Uncaught Exception in patriksimek vm2
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.
AI Analysis
Technical Summary
CVE-2026-44001 describes a sandbox escape vulnerability in the vm2 Node.js sandbox library versions before 3.11.0. Specifically, sandboxed code can cause the host Node.js process to crash by triggering an unhandled Promise rejection through a single Promise constructor. The prior fix for CVE-2026-22709 addressed only the onRejected callback sanitization in .then() and .catch() overrides but did not mitigate the executor-to-unhandledRejection path. This vulnerability allows denial of service by crashing the host process and is resolved in vm2 version 3.11.0.
Potential Impact
The vulnerability allows any code running inside the vm2 sandbox to crash the host Node.js process, resulting in a denial of service. There is no indication of confidentiality or integrity impact. The CVSS 3.1 base score is 8.6 (high), reflecting network attack vector, low attack complexity, no privileges required, no user interaction, and a scope change with high impact on availability.
Mitigation Recommendations
Upgrade vm2 to version 3.11.0 or later, where this vulnerability is fixed. No other mitigations are indicated. Patch status is confirmed by the vendor advisory.
CVE-2026-44001: CWE-248: Uncaught Exception in patriksimek vm2
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.
CVSS v3.1
Score 8.6high
Affected software
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Weaknesses
AI-Powered Analysis
Machine-generated threat intelligence
Technical Analysis
CVE-2026-44001 describes a sandbox escape vulnerability in the vm2 Node.js sandbox library versions before 3.11.0. Specifically, sandboxed code can cause the host Node.js process to crash by triggering an unhandled Promise rejection through a single Promise constructor. The prior fix for CVE-2026-22709 addressed only the onRejected callback sanitization in .then() and .catch() overrides but did not mitigate the executor-to-unhandledRejection path. This vulnerability allows denial of service by crashing the host process and is resolved in vm2 version 3.11.0.
Potential Impact
The vulnerability allows any code running inside the vm2 sandbox to crash the host Node.js process, resulting in a denial of service. There is no indication of confidentiality or integrity impact. The CVSS 3.1 base score is 8.6 (high), reflecting network attack vector, low attack complexity, no privileges required, no user interaction, and a scope change with high impact on availability.
Mitigation Recommendations
Upgrade vm2 to version 3.11.0 or later, where this vulnerability is fixed. No other mitigations are indicated. Patch status is confirmed by the vendor advisory.
Technical Details
- Data Version
- 5.2
- Assigner Short Name
- GitHub_M
- Date Reserved
- 2026-05-04T21:24:36.505Z
- Cvss Version
- 3.1
- State
- PUBLISHED
- Remediation Level
- null
- Vendor Advisory Urls
- [{"url":"https://access.redhat.com/security/cve/CVE-2026-44001","vendor":"Red Hat"}]
Threat ID: 6a04ba1fcbff5d8610f4825c
Added to database: 05/13/2026, 17:51:27 UTC
Last enriched: 07/15/2026, 09:20:21 UTC
Last updated: 07/31/2026, 19:22:59 UTC
Views: 69
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