CVE-2026-48545 HIGH

CVE-2026-48545: Gradio < 6.15.0 Cookie Injection via Shared Proxy Client

Vendor Gradio-App
Product gradio
Weakness CWE-384 · Session fixation
Published May 27, 2026
Last update May 27, 2026

CVSS base score

7.6/10
Attack vector Network
Attack complexity High
Privileges required None
User interaction
Confidentiality
Integrity

CVSS vector

CVSS:4.0/AV:N/AC:H/AT:N/PR:N/UI:P/VC:H/VI:H/VA:N/SC:N/SI:N/SA:N

What the vulnerability does

01Description

Gradio before version 6.15.0 contains a cookie injection vulnerability that allows remote attackers to perform cross-Space session fixation by exploiting a shared module-level HTTP client used across all users in the reverse proxy endpoint. Attackers controlling any HF Space can return a parent-domain cookie that the shared client stores and automatically replays into all subsequent proxy requests to other legitimate Spaces, affecting all users of the same Gradio deployment.

Key dates

02Disclosure timeline

May 27, 2026 CVE published
May 27, 2026 Record updated