Executive Summary

CVE-2026-42428 is a high-severity vulnerability in OpenClaw versions before 2026.4.8 where the software fails to enforce integrity verification on downloaded plugin archives.

This means that when plugins are downloaded, there is no check to ensure that the plugin files have not been tampered with or corrupted.

As a result, attackers can install malicious or altered plugin packages without detection, compromising the security and trust model of the local assistant environment.

The vulnerability is classified under CWE-353, indicating a missing support for integrity checks such as checksums during transmission.

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Impact Analysis

This vulnerability can allow attackers to install malicious or tampered plugins on your system without being detected.

Such unauthorized plugins can execute malicious code or manipulate the local assistant environment, potentially leading to compromise of your system's security.

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Detection Guidance

This vulnerability involves missing integrity verification on downloaded plugin archives in OpenClaw versions before 2026.4.8. Detection would primarily involve verifying the version of OpenClaw installed on your system to determine if it is vulnerable.

You can check the installed OpenClaw version using a command like:

• openclaw --version

If the version is earlier than 2026.4.8, your system is vulnerable. Additionally, monitoring network traffic for plugin downloads without integrity verification metadata could help detect exploitation attempts, but no specific commands for this are provided in the available resources.

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Mitigation Strategies

The immediate mitigation step is to upgrade OpenClaw to version 2026.4.8 or later, where the integrity verification issue has been fixed.

Until the upgrade is applied, avoid installing or updating plugins from untrusted sources to reduce the risk of installing malicious or tampered packages.

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Compliance Impact

The vulnerability in OpenClaw versions before 2026.4.8 allows attackers to install malicious or tampered plugin packages without detection by failing to enforce integrity verification on downloaded plugin archives.

This compromise of the local assistant environment could lead to unauthorized code execution or manipulation, which may result in unauthorized access to or alteration of sensitive data.

Such unauthorized access or data manipulation could negatively impact compliance with common standards and regulations like GDPR and HIPAA, which require ensuring data integrity, confidentiality, and protection against unauthorized access.

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