CVE-2026-54033

EUVD-2026-39460
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.
SSRF
ProviderTypeBase ScoreAtk. VectorAtk. ComplexityPriv. RequiredVector
NISTPrimary
7.7 HIGH
NETWORK
LOW
LOW
CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:C/C:H/I:N/A:N
Base Score
CVSS 3.x
EPSS Score
Percentile: 15.8%
Affected Products (NVD)
VendorProductVersion
librechatlibrechat
𝑥
≤ 0.8.3
𝑥
= Vulnerable software versions
Common Weakness Enumeration
References
https://github.com/danny-avila/LibreChat/security/advisories/GHSA-gc9r-88c3-7qhq
https://github.com/danny-avila/LibreChat/security/advisories/GHSA-gc9r-88c3-7qhq