CVE-2026-62203 in OpenClaw
Summary
by MITRE • 07/17/2026
OpenClaw versions before 2026.6.6 contain an environment variable filtering vulnerability in host exec that fails to properly sanitize rustup startup variables. Attackers with lower-trust caller access or configured input paths can execute or persist actions beyond their intended authorization level.
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Analysis
by VulDB Data Team • 07/17/2026
The OpenClaw software ecosystem presents a critical security vulnerability through its improper handling of environment variables during host execution processes, specifically within the rustup startup variable sanitization mechanism. This flaw affects all versions prior to 2026.6.6 and represents a significant bypass opportunity for threat actors seeking elevated privileges or persistent access within systems utilizing this framework. The vulnerability stems from inadequate input validation and filtering mechanisms that fail to properly sanitize environment variables passed through the host execution pipeline, creating potential attack vectors for privilege escalation and unauthorized system access.
The technical implementation of this vulnerability manifests in the host exec component's failure to adequately filter or validate rustup startup variables before processing them within the execution context. This improper sanitization allows malicious actors to inject arbitrary environment variables that may contain commands or paths designed to execute code beyond the normal operational boundaries. The flaw operates at the system integration layer where environmental configuration parameters are processed without sufficient validation controls, enabling attackers to manipulate execution flows through carefully crafted input sequences. This vulnerability aligns with common weakness enumerations related to improper input validation and environment variable handling, typically classified under CWE-77 and CWE-20 categories.
Operational impact of this vulnerability extends beyond simple privilege escalation scenarios to encompass potential persistent access mechanisms within affected systems. Attackers leveraging this flaw can execute commands or establish backdoors that persist across system sessions, particularly when working with lower-trust caller contexts or when configured input paths are manipulated during the execution process. The implications for enterprise security environments are significant as this vulnerability could enable attackers to maintain long-term access to systems while potentially evading standard monitoring and detection mechanisms. Systems utilizing OpenClaw for automated deployment or execution workflows face heightened risk of unauthorized code execution, data exfiltration, or system compromise.
Mitigation strategies should prioritize immediate patching to version 2026.6.6 or later, which includes enhanced environment variable filtering mechanisms and improved rustup startup variable sanitization. Organizations should implement comprehensive monitoring for unusual environment variable patterns and establish robust input validation controls at all execution points. Security teams must also review existing access controls and privilege models to minimize potential impact from compromised lower-trust caller contexts. The remediation process should include thorough testing of the updated filtering mechanisms to ensure no regression in legitimate system functionality while maintaining strong security postures against similar exploitation vectors. Additional defensive measures may include implementing strict environment variable whitelisting policies and regular security assessments of automated execution frameworks to prevent similar vulnerabilities from emerging in related components. This vulnerability demonstrates the critical importance of environment variable sanitization in modern software architectures, particularly within systems that handle automated execution and deployment processes where improper input handling can lead to severe privilege escalation consequences.