CVE-2026-85673: LLaMA-Factory SSRF Guard Bypass via Redirect and DNS Rebinding

Severity: high (CVSS 7.5 v3.1)
Exploited in the wild: not listed in CISA KEV
EPSS: 0.5% probability of exploitation in the next 30 days
Public exploit or detection template: none known
Published: 2026-09-04 · updated 2026-09-24
Weakness: CWE-918

Description

LLaMA-Factory contains a server-side request forgery vulnerability in the OpenAI-compatible API multimodal media URL handler that allows unauthenticated attackers to bypass SSRF validation. The check_ssrf_url guard validates URLs once but requests.get follows redirects and re-resolves DNS without re-validation, enabling attackers to use HTTP redirects or DNS rebinding to access internal addresses and cloud metadata endpoints.

Affected products

hiyouga LlamaFactory: through 0.9.5

References

https://github.com/hiyouga/LlamaFactory
https://github.com/hiyouga/LlamaFactory/blob/v0.9.5/src/llamafactory/api/chat.py
https://github.com/hiyouga/LlamaFactory/blob/v0.9.5/src/llamafactory/api/common.py
https://github.com/hiyouga/LlamaFactory/issues/10646
https://www.vulncheck.com/advisories/llama-factory-ssrf-guard-bypass-via-redirect-and-dns-rebinding
https://github.com/hiyouga/LlamaFactory/issues/10646

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