CVE-2026-47686
Description
A flaw was found in vm2. The sandbox fails to properly sanitize the error cause property when handling exceptions thrown by host functions. An attacker capable of running untrusted code within the sandbox can exploit this issue to access privileged host objects and bypass isolation boundaries. Consequently, this flaw allows the attacker to escape the sandbox and achieve arbitrary code execution on the underlying host system.
Statement
This vulnerability is rated as having an Important impact for Red Hat products because an attacker capable of executing untrusted scripts within the sandbox environment can escape isolation and execute arbitrary commands in the host process. Successful exploitation requires specific preconditions, namely that an embedder-provided host function exposes chained error objects referencing privileged runtime structures. Consequently, the blast radius allows full host process compromise, though execution depends on the presence and invocation of these specific host error paths.
Mitigation
Mitigation for this issue is either not available or the currently available options do not meet the Red Hat Product Security criteria comprising ease of use and deployment, applicability to widespread installation base, or stability.
Common Vulnerability Scoring System (CVSS) Score Details
Info alert:Important note
CVSS scores for open source components depend on vendor-specific factors (e.g. version or build chain). Therefore, Red Hat's score and impact rating can be different from NVD and other vendors. Red Hat remains the authoritative CVE Naming Authority (CNA) source for its products and services (see Red Hat classifications).
CVSS v3 Score Breakdown
| Red Hat | NVD | cve.org | |
|---|---|---|---|
| Base Score | 9.9 | N/A | 9.9 |
| Attack Vector | Network | N/A | Network |
| Attack Complexity | Low | N/A | Low |
| Privileges Required | Low | N/A | Low |
| User Interaction | None | N/A | None |
| Scope | Changed | N/A | Changed |
| Confidentiality | High | N/A | High |
| Integrity Impact | High | N/A | High |
| Availability Impact | High | N/A | High |
Vector
Red Hat: CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:C/C:H/I:H/A:H
cve.org: CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:C/C:H/I:H/A:H
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