CVE-2026-100536
Received Received - Intake

Path Traversal in OpenClaw Structured Message Attachments

Publication date: 2026-09-26

Last updated on: 2026-09-26

Assigner: VulnCheck

Description
OpenClaw versions before 2026.8.1 fail to validate all source fields in structured message attachments, allowing attackers to hide unvalidated host paths behind allowed attachment sources. Attackers can exploit this by providing multiple source fields to bypass sandbox path validation and cause Telegram delivery to read and send known host files that would otherwise be rejected.

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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-2026-100536
EUVD
EUVD-2026-87514

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.

Attack-Flow Graph

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Executive Summary

OpenClaw versions before 2026.8.1 fail to validate all source fields in structured message attachments. Attackers exploit this by providing multiple source fields to bypass sandbox path validation. Telegram delivery then reads and sends known host files that would normally be rejected.

Detection Guidance

To detect this vulnerability, check OpenClaw versions before 2026.8.1 using commands like 'openclaw --version' or inspect installed packages. Monitor logs for Telegram delivery attempts with multiple source fields in structured attachments. Look for path traversal patterns in attachment processing logs.

Impact Analysis

An attacker could access sensitive files on your system if they trick OpenClaw into processing a malicious attachment. This could lead to unauthorized data exposure or leakage of confidential information.

Compliance Impact

This vulnerability could lead to unauthorized access to personal or sensitive data, violating GDPR and HIPAA compliance requirements for data protection and confidentiality.

Mitigation Strategies

Immediately upgrade OpenClaw to version 2026.8.1 or later. As a temporary workaround, disable Telegram attachment actions for sandboxed agents until patched. Review and tighten media policy path validation rules to prevent bypass attempts.

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