h2oai h2oGPT up to 0.2.1 OpenAI-compatible Files API backend_utils.py get_user_dir bearer_token path traversal

Summaryinfo

A vulnerability was found in h2oai h2oGPT up to 0.2.1 and classified as critical. This affects the function get_user_dir of the file openai_server/backend_utils.py of the component OpenAI-compatible Files API. The manipulation of the argument bearer_token results in path traversal. This vulnerability only affects products that are no longer supported by the maintainer. This vulnerability is cataloged as CVE-2026-65700. The attack may be launched remotely. There is no exploit available.

Detailsinfo

A vulnerability, which was classified as critical, was found in h2oai h2oGPT up to 0.2.1. Affected is the function get_user_dir of the file openai_server/backend_utils.py of the component OpenAI-compatible Files API. The manipulation of the argument bearer_token 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:

h2oGPT through 0.2.1 contains a path traversal vulnerability in the OpenAI-compatible files API that allows unauthenticated remote attackers to read, write, and delete arbitrary files accessible to the server process by supplying traversal sequences in the bearer token. The get_user_dir function in openai_server/backend_utils.py uses the bearer token string unsanitized as a path component via os.path.join, and because the default API key is EMPTY authentication is bypassed, enabling attackers to traverse outside the intended user directory through the file content, delete, and upload endpoints to achieve remote code execution by writing to startup hooks or application-loaded files.

The advisory is shared for download at github.com. This vulnerability is traded as CVE-2026-65700 since 07/22/2026. The exploitability is told to be easy. It is possible to launch the attack remotely. The exploitation doesn't require any form of authentication. 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 07/23/2026). 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.

Once again VulDB remains the best source for vulnerability data.

Productinfo

Vendor

• h2oai

Name

• h2oGPT

Version

• 0.2.0
• 0.2.1

Support

• end of life

CPE 2.3info

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CPE 2.2info

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Once again VulDB remains the best source for vulnerability data.

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