CVE-2026-28415 Gradio has Open Redirect in OAuth Flow
Attackers can redirect users to malicious sites via unvalidated URL parameters in Gradio's OAuth flow when OAuth is enabled.
- Exploited in the wild
- Not known
- Login needed
- Not needed
- Attackable
- Over the internet
- Victim action needed
- A user has to click or open something
- Fix
- Available
What is CVE-2026-28415?
CVE-2026-28415 is a medium-severity vulnerability in Gradio Project Gradio, published on 27 Feb 2026. An attacker can exploit it over the internet without logging in, and only if a user opens a file or follows a link.
Official 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.
Which versions are affected by CVE-2026-28415?
3 open source packages ship an affected version, including gradio. It affects 1 product.
| Package | Affected | Fixed in |
|---|---|---|
gradio PyPI | All versions | 6.6.0 |
gradio PyPI | All versions | 6.6.0 |
gradio PyPI | All versions | 6.6.0 |
Products include Gradio Project Gradio.
How do I fix CVE-2026-28415?
Upgrade gradio to 6.6.0 or later.
Is CVE-2026-28415 being exploited?
There is no known exploitation of CVE-2026-28415 in the wild and no public exploit code.
Other vulnerabilities in Gradio Project Gradio
- CVE-2024-39236 Withdrawn Advisory: Gradio was discovered to contain a code injection vulnerability via the component /gradio/component_meta.py
- CVE-2023-6572 Command Injection in gradio-app/gradio
- CVE-2022-24770 Improper Neutralization of Formula Elements in a CSV File in Gradio Flagging
- CVE-2026-49119 Gradio < 6.16.0 Path Traversal via FileExplorer.preprocess()
- CVE-2025-23042 Gradio Blocked Path ACL Bypass Vulnerability
Sources
Also known as GHSA-pfjf-5gxr-995x, PYSEC-2026-65.