CVE-2025-41258 PUBLISHED

LibreChat RAG API Authentication Bypass

Assigner: sba-research
Reserved: 16.04.2025 Published: 18.03.2026 Updated: 18.03.2026

LibreChat version 0.8.1-rc2 uses the same JWT secret for the user session mechanism and RAG API which compromises the service-level authentication of the RAG API.

Metrics

CVSS 3.1

CVSS Vector: CVSS:3.1/AV:A/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H
CVSS Score: 8

Attack Vector	Adjacent Network	Scope	Unchanged
Attack Complexity	Low	Confidentiality Impact	High
Privileges Required	Low	Integrity Impact	High
User Interaction	None	Availability Impact	High

CVSS 3.1

Product Status

Vendor	danny-avila
Product	LibreChat
Versions	Default: unknown Version 0.8.1-rc2 is affected

Credits

Lisa Gnedt (SBA Research) finder
Michael Koppmann (SBA Research) finder

References

https://github.com/sbaresearch/advisories/tree/public/2025/SBA-ADV-20251205-01_LibreChat_RAG_API_Authentication_Bypass
https://github.com/danny-avila/LibreChat

Problem Types

CWE-284 Improper Access Control CWE