CVE-2026-28415

Gradio has Open Redirect in OAuth Flow

State: Published
Severity: 4.3 Medium
Published: Feb 27, 2026
Updated: Mar 2, 2026
Reserved: Feb 27, 2026

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.

Scores

CVSS	Score	Vector	Source
3.1	4.3 Medium	CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:N/I:L/A:N	GitHub_M

Weaknesses

CWE-200 Exposure of Sensitive Information to an Unauthorized Actor
CWE-284 Improper Access Control
CWE-330 Use of Insufficiently Random Values
CWE-601 URL Redirection to Untrusted Site ('Open Redirect')

Affected Products

Product	Versions
gradiogradio-app	< 6.6.0Affected

References

https://github.com/gradio-app/gradio/security/advisories/GHSA-pfjf-5gxr-995x

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