CVE-2026-48545

Medium

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.

SeverityMedium

CVSS6.8

Exploit probability—

ProductGradio

PublishedMay 27, 2026

First seenMay 27, 2026

Weakness typeCWE-384CWE-384

How to fix

Update

gradio_project gradio6.15.0 or later
gradio6.15.0 or later

Patches

github.com/gradio-app/gradio/commit/feb7237d01f359d2ad4ee42d00344e61692b3b39

Vendor advisories

github.com/gradio-app/gradio/releases/tag/gradio%406.15.0

Affected products

Product	Affected versions	Fixed in
gradio_project gradio	v < 6.15.0	6.15.0
gradioPyPI	v < 6.15.0	6.15.0

Check your version

Choose the product and enter the version you run to see whether it falls in the affected range.

In the Intelligence 360 plan

Attack Surface Management

See the assets tied to your domains, the technologies they run and known vulnerabilities in one list.