agent0ai Agent-Zero 1.7/1.8/1.9/1.10 FileBrowser file_browser.py save_file_b64 path traversal

Summaryinfo

A vulnerability categorized as critical has been discovered in agent0ai Agent-Zero 1.7/1.8/1.9/1.10. This affects the function save_file_b64 of the file python/helpers/file_browser.py of the component FileBrowser. The manipulation results in path traversal. This vulnerability is reported as CVE-2026-51852. The attack can be launched remotely. No exploit exists.

Detailsinfo

A vulnerability, which was classified as critical, was found in agent0ai Agent-Zero 1.7/1.8/1.9/1.10. Affected is the function save_file_b64 of the file python/helpers/file_browser.py of the component FileBrowser. The manipulation with an unknown input leads to a path traversal vulnerability. CWE is classifying the issue as 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. This is going to have an impact on confidentiality, integrity, and availability. CVE summarizes:

agent-zero 1.7, 1.8, 1.9, and 1.10 is vulnerable to Directory Traversal in python/helpers/file_browser.py:FileBrowser.save_file_b64. The save_file_b64 method accepts user-controlled file paths without normalization or validation, allowing path traversal attacks.

The advisory is shared for download at github.com. This vulnerability is traded as CVE-2026-51852 since 06/08/2026. The exploitability is told to be easy. It is possible to launch the attack remotely. There are known technical details, but no exploit is available. The current price for an exploit might be approx. USD $0-$5k (estimation calculated on 09/30/2026). The MITRE ATT&CK project declares the attack technique as T1006.

There is no information about possible countermeasures known. It may be suggested to replace the affected object with an alternative product.

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Productinfo

Vendor

• agent0ai

Name

• Agent-Zero

Version

• 1.7
• 1.8
• 1.9
• 1.10

Website

• Product: https://github.com/agent0ai/agent-zero/

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