# CVE-2026-28415: Gradio open redirect in OAuth flow

Source: https://junglewise.ai/threats/cve-2026-28415-gradio-open-redirect-in-oauth-flow  
Publisher: Junglewise Threat Intelligence, https://junglewise.ai/threats  
Published: 2026-03-01. Updated: 2026-06-06  
License: CC BY 4.0 with a link back

CVE-2026-28415 · Severity: medium · CVSS 4.3 · Published 2026-03-01

Gradio, a library used to build and share machine learning web applications, contains a flaw in its login and logout process. An attacker can create a specially crafted link that, when clicked by a user, redirects them from a trusted Gradio or Hugging Face domain to a malicious website. This can be used in phishing campaigns to trick users into providing credentials or downloading malware by exploiting their trust in the original domain.

Technologies: [gradio (PyPI)](https://junglewise.ai/threats/technologies/gradio). Vendors: [PyPI](https://junglewise.ai/threats/vendors/pypi).

## Quick answers

**Is CVE-2026-28415 exploited in the wild?** No. Junglewise Threat Intelligence has no report of CVE-2026-28415 being exploited in the wild.

**How severe is CVE-2026-28415?** Medium severity, with a CVSS score of 4.3, published 1 March 2026.

**Which products and versions are affected?** gradio (PyPI) < 6.6.0, ECOSYSTEM:introduced=0,fixed=6.6.0.

**Is there a fix for CVE-2026-28415?** Yes. gradio (PyPI): upgrade to 6.6.0 or later. Junglewise finds every place you run it, drafts the upgrade and applies it once you approve.

**How is CVE-2026-28415 attacked?** It is attacked over the network, in a software library.

**Am I affected by CVE-2026-28415?** Check whether you run gradio (PyPI) at an affected version. Junglewise does that check for you around the clock: connect your code, cloud and domains, and it matches new vulnerabilities like this one against what you actually run and tells you when one reaches you.

## How to fix

- gradio (PyPI): upgrade to 6.6.0 or later

  ```sh
  pip install "gradio>=6.6.0"
  ```


## Technical details

An open redirect vulnerability exists in Gradio's OAuth implementation within the `_redirect_to_target()` function. The function retrieves a destination from the `_target_url` query parameter and passes it directly to a `RedirectResponse` without validation. This affects the `/logout` and `/login/callback` endpoints in applications where OAuth is enabled (such as those using `gr.LoginButton` on Hugging Face Spaces). An attacker can exploit this by sending a crafted URL to a victim, which will redirect them to an external malicious host after a successful login or logout action. The vulnerability is fixed in version 6.6.0 by sanitizing the parameter to only allow local paths.

## Affected products

- gradio-app gradio < 6.6.0

## Identifiers

- CVE-2026-28415
- GHSA-pfjf-5gxr-995x
- PYSEC-2026-65

## Timeline

- 2026-02-27: disclosed
- 2026-02-27: patched: Version 6.6.0 released
- 2026-03-01: advisory

## References

- [https://api.github.com/users/logicx24](https://api.github.com/users/logicx24)
- [https://github.com/logicx24](https://github.com/logicx24)
- [https://api.github.com/users/logicx24/gists%7B/gist_id%7D](https://api.github.com/users/logicx24/gists%7B/gist_id%7D)
- [https://api.github.com/users/logicx24/repos](https://api.github.com/users/logicx24/repos)
- [https://avatars.githubusercontent.com/u/5554667?v=4](https://avatars.githubusercontent.com/u/5554667?v=4)
- [https://api.github.com/users/logicx24/events%7B/privacy%7D](https://api.github.com/users/logicx24/events%7B/privacy%7D)

## Related threats

- [PYSEC-2026-1423 - Gradio CORS Origin Validation Bypass Vulnerability](https://junglewise.ai/threats/cve-2025-5320-gradio-cors-origin-validation-bypass-vulnerability)
- [PYSEC-2026-1410 - Gradio DOS in multipart boundry while uploading the file](https://junglewise.ai/threats/cve-2024-8966-gradio-dos-in-multipart-boundry-while-uploading-the-file)
- [PYSEC-2026-1411 - Gradio Vulnerable to Open Redirect](https://junglewise.ai/threats/cve-2024-8021-gradio-vulnerable-to-open-redirect)
- [PYSEC-2026-1418 - Gradio Path Traversal vulnerability](https://junglewise.ai/threats/cve-2024-12217-gradio-path-traversal-vulnerability)
- [PYSEC-2026-1417 - Gradio Vulnerable to Arbitrary File Deletion](https://junglewise.ai/threats/cve-2024-10648-gradio-vulnerable-to-arbitrary-file-deletion)