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
The vm2 Node.js sandbox prior to version 3.11.0 is vulnerable to a sandbox escape vulnerability (CVE-2026-44001) where any sandboxed code can cause the host Node.js process to crash by triggering an unhandled Promise rejection. The prior fix for CVE-2026-22709 only sanitized the onRejected callbacks in .then() and .catch() overrides but did not address the executor-to-unhandledRejection path, leaving the host process exposed to crashes. This vulnerability is classified under CWE-248 (Uncaught Exception) and results in a denial of service condition. The issue is resolved in vm2 version 3.11.0.
Potential Impact
An attacker who can submit code to the vm2 sandbox can cause the host Node.js process to crash, resulting in a denial of service. There is no impact on confidentiality or integrity, but availability is severely affected. The vulnerability requires no privileges and no user interaction, and can be exploited remotely over the network.
Mitigation Recommendations
A fix is available in vm2 version 3.11.0. Users should upgrade to vm2 3.11.0 or later to remediate this vulnerability. No other mitigations are indicated 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
patriksimek
vm2
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Weaknesses
AI-Powered Analysis
Machine-generated threat intelligence
Technical Analysis
The vm2 Node.js sandbox prior to version 3.11.0 is vulnerable to a sandbox escape vulnerability (CVE-2026-44001) where any sandboxed code can cause the host Node.js process to crash by triggering an unhandled Promise rejection. The prior fix for CVE-2026-22709 only sanitized the onRejected callbacks in .then() and .catch() overrides but did not address the executor-to-unhandledRejection path, leaving the host process exposed to crashes. This vulnerability is classified under CWE-248 (Uncaught Exception) and results in a denial of service condition. The issue is resolved in vm2 version 3.11.0.
Potential Impact
An attacker who can submit code to the vm2 sandbox can cause the host Node.js process to crash, resulting in a denial of service. There is no impact on confidentiality or integrity, but availability is severely affected. The vulnerability requires no privileges and no user interaction, and can be exploited remotely over the network.
Mitigation Recommendations
A fix is available in vm2 version 3.11.0. Users should upgrade to vm2 3.11.0 or later to remediate this vulnerability. No other mitigations are indicated 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
- 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: 08/06/2026, 13:01:02 UTC
Last updated: 09/13/2026, 22:12:47 UTC
Views: 87
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