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

What is CVE-2026-48545?

CVE-2026-48545 is a high-severity vulnerability in Gradio Project Gradio, published on 27 May 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 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.

Weakness: CWE-384

Which versions are affected by CVE-2026-48545?

3 open source packages ship an affected version, including gradio. It affects 1 product.

Products include Gradio Project Gradio.

How do I fix CVE-2026-48545?

Upgrade gradio to 6.15.0 or later.

Is CVE-2026-48545 being exploited?

It is not confirmed as exploited in the wild, but public exploit code for CVE-2026-48545 exists.

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• CVE-2024-39236 Withdrawn Advisory: Gradio was discovered to contain a code injection vulnerability via the component /gradio/component_meta.py Critical 9.8
• CVE-2023-6572 Command Injection in gradio-app/gradio Critical 9.6
• CVE-2022-24770 Improper Neutralization of Formula Elements in a CSV File in Gradio Flagging High 8.8
• CVE-2026-49119 Gradio < 6.16.0 Path Traversal via FileExplorer.preprocess() High 8.7
• CVE-2025-23042 Gradio Blocked Path ACL Bypass Vulnerability High 8.7

All Gradio Project Gradio vulnerabilities

Sources

• CVE record
• NVD
• OSV
• GitHub advisory
• How this page is made

Also known as GHSA-7hp7-4p35-3cx2, PYSEC-2026-2178.