Executive Summary

CVE-2026-41296 is a critical vulnerability in OpenClaw versions before 2026.3.31 involving a time-of-check to time-of-use (TOCTOU) race condition in the remote filesystem bridge's readFile function.

The vulnerability arises because the sandbox performs path validation and file reading as separate operations, creating a timing gap that attackers can exploit.

By exploiting this gap, an attacker can bypass sandbox restrictions and read arbitrary files outside the intended sandbox environment, effectively escaping the sandbox.

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Impact Analysis

This vulnerability allows attackers with low privileges to remotely exploit the system without user interaction.

By escaping the sandbox, attackers can read arbitrary files outside the sandbox, leading to unauthorized access to sensitive data.

The impact includes high confidentiality and integrity compromise of the affected system, potentially leading to data leakage or unauthorized modification of system data.

Although availability is not impacted on the vulnerable system, subsequent systems may suffer high impact on confidentiality, integrity, and availability.

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Mitigation Strategies

To mitigate CVE-2026-41296, you should upgrade OpenClaw to version 2026.3.31 or later, where the vulnerability has been fixed.

The fix includes patching the remote filesystem bridge's readFile function to prevent the TOCTOU race condition by performing atomic file reads, rejecting mount-root reads, disallowing non-regular files and hardlinked files, and preventing symlink escapes.

Applying this update will prevent attackers from bypassing sandbox restrictions and reading arbitrary files, thus protecting your system from sandbox escape attacks.

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Compliance Impact

CVE-2026-41296 allows attackers to bypass sandbox restrictions and read arbitrary files, leading to unauthorized access to sensitive data. This unauthorized data access and potential data leakage can compromise the confidentiality and integrity of information.

Such unauthorized access and data breaches can negatively impact compliance with common standards and regulations like GDPR and HIPAA, which require strict controls on data confidentiality, integrity, and access.

Therefore, if exploited, this vulnerability could lead to violations of data protection requirements mandated by these regulations, potentially resulting in legal and financial consequences for affected organizations.

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Detection Guidance

There are no specific detection commands or network/system scanning instructions provided in the available resources for CVE-2026-41296.

However, detection can focus on identifying vulnerable OpenClaw versions prior to 2026.3.31, as these contain the TOCTOU race condition in the remote filesystem bridge's readFile function.

To detect if the vulnerable OpenClaw version is running, you can check the installed OpenClaw version on your system or network devices.

• Run a version check command or query the OpenClaw package version, for example: `openclaw --version` or check the package manager for installed OpenClaw versions.
• Monitor for unusual file read operations or sandbox escapes in logs related to the remote filesystem bridge, though no specific commands are provided.

The best mitigation and detection approach is to verify and upgrade OpenClaw to version 2026.3.31 or later, which contains the patch addressing this vulnerability.

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