gradio-app gradio up to 6.14.x Reverse Proxy Endpoint session fixiation

Summaryinfo

A vulnerability was found in gradio-app gradio up to 6.14.x and classified as critical. This issue affects some unknown processing of the component Reverse Proxy Endpoint. Executing a manipulation can lead to session fixiation. This vulnerability is registered as CVE-2026-48545. It is possible to launch the attack remotely. No exploit is available. It is suggested to upgrade the affected component.

Detailsinfo

A vulnerability was found in gradio-app gradio up to 6.14.x. It has been declared as critical. This vulnerability affects an unknown code of the component Reverse Proxy Endpoint. The manipulation with an unknown input leads to a session fixiation vulnerability. The CWE definition for the vulnerability is CWE-384. Authenticating a user, or otherwise establishing a new user session, without invalidating any existing session identifier gives an attacker the opportunity to steal authenticated sessions. As an impact it is known to affect confidentiality, integrity, and availability. CVE summarizes:

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.

The weakness was published by Yu Sun as 13369. The advisory is available at github.com. This vulnerability was named CVE-2026-48545 since 05/21/2026. The exploitation appears to be difficult. The attack can be initiated remotely. No form of authentication is required for a successful exploitation. The technical details are unknown and an exploit is not available.

Upgrading to version 6.15.0 eliminates this vulnerability. The upgrade is hosted for download at github.com. Applying the patch feb7237d01f359d2ad4ee42d00344e61692b3b39 is able to eliminate this problem. The bugfix is ready for download at github.com. The best possible mitigation is suggested to be upgrading to the latest version.

If you want to get best quality of vulnerability data, you may have to visit VulDB.

Productinfo

Vendor

• gradio-app

Name

• gradio

Version

• 6.0
• 6.1
• 6.2
• 6.3
• 6.4
• 6.5
• 6.6
• 6.7
• 6.8
• 6.9
• 6.10
• 6.11
• 6.12
• 6.13
• 6.14

License

• open-source

Website

• Product: https://github.com/gradio-app/gradio/

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