danny-avila LibreChat up to 0.8.4 API Endpoint server-side request forgery

Summaryinfo

A vulnerability was found in danny-avila LibreChat. It has been declared as critical. This issue affects some unknown processing of the component API Endpoint. Executing a manipulation can lead to server-side request forgery. This vulnerability is registered as CVE-2026-54033. It is possible to launch the attack remotely. No exploit is available. It is recommended to upgrade the affected component.

Detailsinfo

A vulnerability classified as critical was found in danny-avila LibreChat. This vulnerability affects some unknown processing of the component API Endpoint. The manipulation with an unknown input leads to a server-side request forgery vulnerability. The CWE definition for the vulnerability is CWE-918. The web server receives a URL or similar request from an upstream component and retrieves the contents of this URL, but it does not sufficiently ensure that the request is being sent to the expected destination. As an impact it is known to affect confidentiality, integrity, and availability. CVE summarizes:

LibreChat is an enhanced ChatGPT clone that supports multiple AI providers. Prior to 0.8.4-rc1, LibreChat allows users to configure custom OpenAI-compatible API endpoints by setting a baseURL. This URL is used to construct HTTP requests without any SSRF validation — no private IP check, no scheme restriction, no DNS pinning. An authenticated user can set baseURL to internal network addresses. This vulnerability is fixed in 0.8.4-rc1.

The advisory is shared for download at github.com. This vulnerability was named CVE-2026-54033 since 06/11/2026. The exploitation appears to be easy. The attack can be initiated remotely. There are neither technical details nor an exploit publicly available.

Upgrading to version 0.8.4-rc1 eliminates this vulnerability.

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Productinfo

Type

• Chat Software

Vendor

• danny-avila

Name

• LibreChat

Version

• 0.7.5
• 0.7.6
• 0.7.7
• 0.7.8
• 0.7.9
• 0.7.9-rc1
• 0.8.0-rc2
• 0.8.1
• 0.8.1-rc2
• 0.8.2
• 0.8.2-rc2
• 0.8.2-rc3
• 0.8.3
• 0.8.3-rc1
• 0.8.3-rc2
• 0.8.4

Website

• Product: https://github.com/danny-avila/LibreChat/

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