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CVE-2026-28415— Gradio has Open Redirect in OAuth Flow

Quick assessment

Affected
gradio-app gradio
Exploitation
No confirmed in-the-wild exploitation; assess based on exposure
Recommended action
Check the vendor advisory and references for a fixed version. If immediate upgrade is impossible, restrict exposure and increase monitoring.

Gradio是Gradio开源的一个开源 Python 库，是通过友好的 Web 界面演示机器学习模型的方法。 Gradio 6.6.0之前版本存在输入验证错误漏洞，该漏洞源于OAuth流程中的_redirect_to_target函数接受未验证的_target_url查询参数，可能导致重定向至任意外部URL。

CVSS 4.3 · Medium EPSS 0.29% · P20

Possible ATT&CK Techniques 1 AI

T1189 · Drive-by Compromise
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I. Basic Information for CVE-2026-28415

Vulnerability Information
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Vulnerability Title
Gradio has Open Redirect in OAuth Flow
Source: CVE Program / CVE List V5
Vulnerability Description
Gradio is an open-source Python package designed for quick prototyping. Prior to version 6.6.0, the _redirect_to_target() function in Gradio's OAuth flow accepts an unvalidated _target_url query parameter, allowing redirection to arbitrary external URLs. This affects the /logout and /login/callback endpoints on Gradio apps with OAuth enabled (i.e. apps running on Hugging Face Spaces with gr.LoginButton). Starting in version 6.6.0, the _target_url parameter is sanitized to only use the path, query, and fragment, stripping any scheme or host.
Source: CVE Program / CVE List V5
CVSS Information
CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:N/I:L/A:N
Source: CVE Program / CVE List V5
Vulnerability Type
信息暴露
Source: CVE Program / CVE List V5
Vulnerability Title
Gradio 输入验证错误漏洞
Source: CNNVD (China National Vulnerability Database)
Vulnerability Description
Gradio是Gradio开源的一个开源 Python 库，是通过友好的 Web 界面演示机器学习模型的方法。 Gradio 6.6.0之前版本存在输入验证错误漏洞，该漏洞源于OAuth流程中的_redirect_to_target函数接受未验证的_target_url查询参数，可能导致重定向至任意外部URL。
Source: CNNVD (China National Vulnerability Database)
CVSS Information
N/A
Source: CNNVD (China National Vulnerability Database)
Vulnerability Type
N/A
Source: CNNVD (China National Vulnerability Database)

Affected Products

Vendor Product Affected Versions CPE Subscribe
gradio-app gradio < 6.6.0 -

II. Public POCs for CVE-2026-28415

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III. Intelligence Information for CVE-2026-28415

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Same Patch Batch · gradio-app · 2026-02-27 · 4 CVEs total

CVE-2026-28416 8.2 HIGH Gradio has SSRF via Malicious `proxy_url` Injection in `gr.load()` Config Processing
CVE-2026-28414 7.5 HIGH Gradio has Absolute Path Traversal on Windows with Python 3.13+
CVE-2026-27167 Gradio: Mocked OAuth Login Exposes Server Credentials and Uses Hardcoded Session Secret

IV. Related Vulnerabilities

Same product: gradio
Same vendor: gradio-app
Same weakness: CWE-200

V. Comments for CVE-2026-28415

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