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CVE-2026-54033 Details

Description

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.

Metrics

CVSS 3.x Severity and Vector Strings:

NIST: [email protected]CVSS-B:6.5 MEDIUMVector:CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:N/A:N

CNA: [email protected]CVSS-B:7.7 HIGHVector:CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:C/C:H/I:N/A:N

References to Advisories, Solutions, and Tools

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URL	Source(s)	Tag(s)
https://github.com/danny-avila/LibreChat/security/advisories/GHSA-gc9r-88c3-7qhq	CISA-ADP	ExploitMitigationVendor Advisory
https://github.com/danny-avila/LibreChat/security/advisories/GHSA-gc9r-88c3-7qhq	[email protected]	ExploitMitigationVendor Advisory

Weakness Enumeration

CWE-ID	CWE Name	Source
CWE-918	Server-Side Request Forgery (SSRF)	[email protected]

Affected Products

Product	Versions
librechat librechat	<= 0.8.3
CPE cpe:2.3:a:librechat:librechat:::::::: Remediation No remediation found in references.

Change History

3 change records found show changes

Date	Action	Recorded By
Jun 29, 2026	Initial Analysis	[email protected]
Jun 25, 2026	CVE Modified	CISA-ADP
Jun 25, 2026	New CVE Received	[email protected]