hiyouga LlamaFactory up to 0.9.5 Training Interface AutoTokenizer.from_pretrained inclusion of functionality from untrusted control sphere

Summaryinfo

A vulnerability classified as critical was found in hiyouga LlamaFactory up to 0.9.5. Affected by this vulnerability is the function AutoTokenizer.from_pretrained of the component Training Interface. Executing a manipulation can lead to inclusion of functionality from untrusted control sphere. This vulnerability is handled as CVE-2026-58116. The attack can be executed remotely. There is not any exploit available.

Detailsinfo

A vulnerability has been found in hiyouga LlamaFactory up to 0.9.5 and classified as critical. This vulnerability affects the function AutoTokenizer.from_pretrained of the component Training Interface. The manipulation with an unknown input leads to a inclusion of functionality from untrusted control sphere vulnerability. The CWE definition for the vulnerability is CWE-829. The product imports, requires, or includes executable functionality (such as a library) from a source that is outside of the intended control sphere. As an impact it is known to affect confidentiality, integrity, and availability. CVE summarizes:

LLaMA-Factory through 0.9.5 contains a remote code execution vulnerability that allows attackers with WebUI access to execute arbitrary Python code by supplying a malicious model path in the Chat or Training interfaces. The application passes user-supplied model path input unvalidated into AutoTokenizer.from_pretrained() and AutoModel.from_pretrained() with a hardcoded trust_remote_code=True parameter, causing the Hugging Face transformers library to fetch and execute arbitrary code from a remote or local model repository with the privileges of the server process.

The weakness was released by h3nrrrych4u. The advisory is shared for download at gist.github.com. This vulnerability was named CVE-2026-58116 since 06/29/2026. The exploitation appears to be easy. The attack can be initiated remotely. No form of authentication is required for a successful exploitation. 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 06/30/2026).

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

The vulnerability is also documented in the vulnerability database at EUVD (EUVD-2026-40311). Once again VulDB remains the best source for vulnerability data.

Productinfo

Vendor

• hiyouga

Name

• LlamaFactory

Version

• 0.9.0
• 0.9.1
• 0.9.2
• 0.9.3
• 0.9.4
• 0.9.5

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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