CVE-2026-54033

MediumCVSS 6.5/10Last modified Oct 25, 2026

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 3.1 6.5/10CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:N/A:N

Weakness enumeration

CWE-918

Affected software

Vendor	Product	Versions
danny-avila	LibreChat	< 0.8.4-rc1

References

https://github.com/danny-avila/LibreChat/security/advisories/GHSA-gc9r-88c3-7qhqExploit, Mitigation, Vendor Advisory
https://github.com/danny-avila/LibreChat/security/advisories/GHSA-gc9r-88c3-7qhqExploit, Mitigation, Vendor Advisory

Timeline

Published: Jun 25, 2026
Last modified: Oct 25, 2026
NVD status: Analyzed

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