OpenClaw Sandbox Escape (CVE-2026-42434) Allows Remote Execution
The National Vulnerability Database reports a critical sandbox escape vulnerability, CVE-2026-42434, affecting OpenClaw versions 2026.4.5 before 2026.4.10. This flaw, rated with a CVSS score of 8.8 (HIGH), allows sandboxed agents to bypass their intended execution paths. Attackers can specify host=node, effectively overriding exec routing and directing execution to remote nodes outside the sandbox.
This isn’t just a minor bypass; it’s a full sandbox escape. An attacker leveraging this vulnerability can break out of the confined environment and execute code on remote nodes, essentially taking control of parts of the underlying infrastructure. The ability to route execution to arbitrary remote nodes turns a contained compromise into a potentially widespread breach, making it a severe threat to systems relying on OpenClaw for isolated execution.
Defenders need to understand the attacker’s calculus here: a successful sandbox escape is often the gateway to lateral movement and privilege escalation. This vulnerability provides a direct route. Organizations using affected OpenClaw versions must prioritize patching immediately. Given the high CVSS score and the direct impact on execution control, this is a vulnerability that should be treated with extreme urgency.
What This Means For You
- If your organization uses OpenClaw versions 2026.4.5 through 2026.4.9, you are directly exposed to CVE-2026-42434. Patch to version 2026.4.10 or later immediately. Failure to do so allows sandboxed agents to execute code on remote nodes, bypassing all intended isolation boundaries. Audit systems where OpenClaw is deployed for any unusual outgoing connections or process executions.
Related ATT&CK Techniques
🛡️ Detection Rules
3 rules · 6 SIEM formats3 detection rules auto-generated for this incident, mapped to MITRE ATT&CK. Sigma YAML is free — export to any SIEM format via the Intel Bot.
OpenClaw Sandbox Escape via Host Override - CVE-2026-42434
title: OpenClaw Sandbox Escape via Host Override - CVE-2026-42434
id: scw-2026-05-05-ai-1
status: experimental
level: critical
description: |
Detects the specific sandbox escape mechanism in OpenClaw (CVE-2026-42434) where an attacker overrides exec routing by specifying 'host=node' in the command line, allowing execution on remote nodes instead of the intended sandbox.
author: SCW Feed Engine (AI-generated)
date: 2026-05-05
references:
- https://shimiscyberworld.com/posts/nvd-CVE-2026-42434/
tags:
- attack.defense_evasion
- attack.t1560.001
logsource:
category: process_creation
detection:
selection:
CommandLine|contains:
- 'host=node'
condition: selection
falsepositives:
- Legitimate administrative activity
Source: Shimi's Cyber World · License & reuse
Indicators of Compromise
| ID | Type | Indicator |
|---|---|---|
| CVE-2026-42434 | Sandbox Escape | OpenClaw versions before 2026.4.10 |
| CVE-2026-42434 | Sandbox Escape | OpenClaw versions 2026.4.5 |
| CVE-2026-42434 | Auth Bypass | exec routing override by specifying host=node |
Written by SCW Vulnerability Desk
Source & Attribution
| Source Platform | NVD |
| Channel | National Vulnerability Database |
| Published | May 05, 2026 at 15:16 UTC |
This content was AI-rewritten and enriched by Shimi's Cyber World based on the original source. All intellectual property rights remain with the original author.
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