CVE-2026-27167: Gradio Mocked OAuth Login Exposes Server Credentials

# CVE-2026-27167: Gradio Mocked OAuth Login Exposes Server Credentials

https://gcdradar.vercel.app/incidents/cve-2026-27167-gradio-mocked-oauth-login-exposes-server-cred · AIR-2026-0486 · closed 2026-02-27

- Lane: Patch now
- Severity: 2 (Disclosed vulnerability)
- Fix status: Fix status unknown
- First reported: 2026-02-27 (happened 2026-03-01)
- AI role: Attack on AI
- Products: Gradio
- CVE ids: CVE-2026-27167
- CVSS: 0

## Summary

A vulnerability in Gradio allows unauthenticated remote attackers to trigger mocked OAuth flows and steal server-side access tokens using hardcoded session secrets. A patch has been released by the vendor.

## What to do

No action recorded; read the sources below and the vendor's advisory.

## Latest updates

- 2026-03-01: CVE-2026-27167: Gradio: Mocked OAuth Login Exposes Server Credentials and Uses Hardcoded Session Secret (https://github.com/advisories/GHSA-h3h8-3v2v-rg7m)
- 2026-02-27: CVE-2026-27167: Gradio is an open-source Python package designed for quick prototyping. (https://nvd.nist.gov/vuln/detail/CVE-2026-27167)

## Sources

- 2026-02-27 NVD: CVE-2026-27167: Gradio is an open-source Python package designed for quick prototyping. https://nvd.nist.gov/vuln/detail/CVE-2026-27167
- 2026-03-01 GitHub Advisory Database: CVE-2026-27167: Gradio: Mocked OAuth Login Exposes Server Credentials and Uses Hardcoded Session Secret https://github.com/advisories/GHSA-h3h8-3v2v-rg7m

Verify against the vendor's advisory before changing production. Data CC BY-SA 4.0, https://gcdradar.vercel.app.