Gradio is an open-source Python package designed for quick prototyping. Starting in version 4.16.0 and prior to version 6.6.0, Gradio applications running outside of Hugging Face Spaces automatically enable "mocked" OAuth routes when OAuth components (e.g. `gr.LoginButton`) are used. When a user visits `/login/huggingface`, the server retrieves its own Hugging Face access token via `huggingface_hub.get_token()` and stores it in the visitor's session cookie. If the application is network-accessible, any remote attacker can trigger this flow to steal the server owner's HF token. The session cookie is signed with a hardcoded secret derived from the string `"-v4"`, making the payload trivially decodable. Version 6.6.0 fixes the issue.
CVSS
No CVSS.
References
| Link | Resource |
|---|---|
| https://github.com/gradio-app/gradio/security/advisories/GHSA-h3h8-3v2v-rg7m | Exploit Vendor Advisory |
Configurations
History
17 Jun 2026, 10:26
| Type | Values Removed | Values Added |
|---|---|---|
| Summary |
|
05 Mar 2026, 13:13
| Type | Values Removed | Values Added |
|---|---|---|
| References | () https://github.com/gradio-app/gradio/security/advisories/GHSA-h3h8-3v2v-rg7m - Exploit, Vendor Advisory | |
| CPE | cpe:2.3:a:gradio_project:gradio:*:*:*:*:*:python:*:* | |
| First Time |
Gradio Project
Gradio Project gradio |
27 Feb 2026, 22:16
| Type | Values Removed | Values Added |
|---|---|---|
| New CVE |
Information
Published : 2026-02-27 22:16
Updated : 2026-06-17 10:26
NVD link : CVE-2026-27167
Mitre link : CVE-2026-27167
CVE.ORG link : CVE-2026-27167
JSON object : View
Products Affected
gradio_project
- gradio
