CVE-2026-22177 in OpenClaw
Summary
by MITRE • 03/18/2026
OpenClaw versions prior to 2026.2.21 fail to filter dangerous process-control environment variables from config env.vars, allowing startup-time code execution. Attackers can inject variables like NODE_OPTIONS or LD_* through configuration to execute arbitrary code in the OpenClaw gateway service runtime context.
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Analysis
by VulDB Data Team • 03/22/2026
The vulnerability identified as CVE-2026-22177 represents a critical security flaw in OpenClaw versions prior to 2026.2.21 that stems from inadequate input validation and environment variable handling during application startup. This issue falls under the category of environment variable injection attacks and specifically manifests as a failure to properly sanitize configuration environment variables before they are processed by the gateway service. The flaw creates a pathway for attackers to manipulate the runtime environment of the OpenClaw service through maliciously crafted configuration inputs that contain dangerous process-control environment variables.
The technical implementation of this vulnerability exploits the lack of proper filtering mechanisms within the OpenClaw configuration processing pipeline. When the gateway service initializes, it reads environment variables from configuration files or external sources without adequately validating or sanitizing these inputs. Attackers can inject variables such as NODE_OPTIONS, which is commonly used in node.js applications to pass command-line arguments to the node runtime, or LD_* variables that control dynamic linker behavior. These variables can be leveraged to execute arbitrary code within the context of the OpenClaw gateway service, potentially allowing for privilege escalation or full system compromise. The vulnerability directly maps to CWE-78, which describes improper neutralization of special elements used in OS commands, and CWE-423, which addresses the improper protection of resource identifiers.
The operational impact of this vulnerability is significant as it allows attackers to achieve code execution at startup time, which is a particularly dangerous attack vector. Since the gateway service typically runs with elevated privileges and has access to sensitive system resources, successful exploitation could lead to complete system compromise. The attack surface is broad as configuration files are often managed by administrators and may be accessible to various user groups within an organization. The vulnerability is particularly concerning because it operates at the service initialization phase, meaning that any malicious code injection occurs before the application has a chance to implement additional security controls or monitoring mechanisms.
Mitigation strategies for this vulnerability should focus on implementing robust input validation and environment variable sanitization at the configuration processing layer. Organizations should immediately upgrade to OpenClaw version 2026.2.21 or later, which includes proper filtering mechanisms for dangerous environment variables. Additionally, administrators should implement strict configuration management practices that prevent unauthorized modification of environment variable settings and establish monitoring procedures to detect suspicious environment variable usage. The implementation of principle of least privilege should be enforced, ensuring that the gateway service runs with minimal required permissions. This vulnerability aligns with ATT&CK technique T1059.007 for command and script interpreter, specifically focusing on the use of node.js and dynamic linker variables for code execution. Organizations should also consider implementing runtime application self-protection measures and environment variable monitoring to detect and prevent exploitation attempts.