CVE-2026-100533
Received Received - Intake

Path Traversal in OpenClaw via Unicode Filename Normalization

Publication date: 2026-09-26

Last updated on: 2026-09-26

Assigner: VulnCheck

Description
OpenClaw versions before 2026.8.1 contain a path traversal vulnerability in the tools.fs.workspaceOnly feature where Unicode filename fallback can normalize validated parent directory components. Admitted requesters can exploit canonically equivalent sibling directories to read files outside the configured workspace boundary.

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Meta Information

Published
2026-09-26
Last Modified
2026-09-26
Generated
2026-09-26
AI Q&A
2026-09-26
EPSS Evaluated
N/A
NVD
CVE-2026-100533
EUVD
EUVD-2026-87517

Affected Vendors & Products

Showing 1 associated CPE
Vendor Product Version / Range
openclaw openclaw to 2026.8.1 (exc)

Helpful Resources

Exploitability

CWE
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KEV
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CWE ID Description
CWE-22 The product uses external input to construct a pathname that is intended to identify a file or directory that is located underneath a restricted parent directory, but the product does not properly neutralize special elements within the pathname that can cause the pathname to resolve to a location that is outside of the restricted directory.

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Executive Summary

CVE-2026-100533 is a path traversal vulnerability in OpenClaw versions before 2026.8.1. It involves a Unicode filename fallback mechanism that bypasses workspace restrictions. The tools.fs.workspaceOnly feature fails to validate parent directory components after Unicode normalization, allowing attackers to access files outside the intended workspace boundary.

Detection Guidance

Check OpenClaw version with 'openclaw --version' or inspect installed package metadata. Look for filesystem access patterns involving Unicode normalization or sibling directories. Monitor logs for unauthorized file read attempts outside configured workspace boundaries.

Impact Analysis

An attacker with knowledge of a target file path and access to canonically equivalent sibling directories could exploit this to read sensitive files outside the configured workspace. This could lead to unauthorized data exposure, including confidential or restricted files.

Compliance Impact

This vulnerability could lead to unauthorized access to sensitive data, violating compliance requirements for GDPR (data protection) and HIPAA (health information privacy). Unauthorized file access may result in data breaches, triggering regulatory penalties and legal consequences.

Mitigation Strategies

Upgrade OpenClaw to version 2026.8.1 or later immediately. If upgrading is not possible, restrict filesystem access tools and disable the tools.fs.workspaceOnly feature. Review filesystem permissions to prevent unauthorized access to sensitive directories.

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