← Vulnerability feed

Vulnerability record · CVE-2026-54030 · published 25 June 2026

CVE-2026-54030: Librechat origin validation error vulnerability

Librechat · Librechat

LibreChat is an enhanced ChatGPT clone that supports multiple AI providers. Prior to 0.8.5, LibreChat's MCP OAuth implementation does not validate that the resource parameter from OAuth Protected Resource metadata (RFC 9728) matches the configured MCP server URL, allowing a malicious MCP server to steal access tokens intended for a legitimate server. This vulnerability is fixed in 0.8.5.

9.3 CVSS 3.1 Critical EPSS 0.17% · top 94.6% CWE-346 · Origin validation error
9.3CVSS 3.1 base score
0.17%EPSS exploitation probability, 30 days
NoNot in CISA KEV
1Affected product versions listed by NVD
2References, 2 tagged exploit
29 Jun 2026Last modified by NVD

Description

LibreChat is an enhanced ChatGPT clone that supports multiple AI providers. Prior to 0.8.5, LibreChat's MCP OAuth implementation does not validate that the resource parameter from OAuth Protected Resource metadata (RFC 9728) matches the configured MCP server URL, allowing a malicious MCP server to steal access tokens intended for a legitimate server. This vulnerability is fixed in 0.8.5.

CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:C/C:H/I:H/A:N

Affected products

1 vulnerable configurations from NVD's CPE data, grouped by vendor and product.

References

LinkTags
https://github.com/danny-avila/LibreChat/security/advisories/GHSA-gvpj-vm2f-2m23 ExploitVendor Advisory
https://github.com/danny-avila/LibreChat/security/advisories/GHSA-gvpj-vm2f-2m23 ExploitVendor Advisory

Track CVE-2026-54030 inside VULONE

Watch it alongside the ransomware crews, C2 infrastructure and forum chatter that reference it, query it through the API and pull it into your SIEM over TAXII.

Start free Open in platform

Related vulnerabilities

Same products first, then exploited flaws of the same weakness class.

9.9CVE-2026-22252Librechat improper authorization vulnerabilityLibreChat is a ChatGPT clone with additional features. Prior to v0.8.2-rc2, LibreChat's MCP stdio transport accepts arbitrary commands without valida…EPSS 4.1%9.8CVE-2024-41703Librechat improper access control vulnerabilityLibreChat through 0.7.4-rc1 has incorrect access control for message updates.EPSS 0.36%9.8CVE-2024-41704Librechat path traversal vulnerabilityLibreChat through 0.7.4-rc1 does not validate the normalized pathnames of images.EPSS 0.67%9.6CVE-2026-32625Librechat information exposure vulnerabilityLibreChat is an enhanced ChatGPT clone that supports multiple AI providers. In versions up to and including 0.8.3, the Model Context Protocol (MCP) s…EPSS 0.41%9.1CVE-2024-10361Librechat path traversal vulnerabilityAn arbitrary file deletion vulnerability exists in danny-avila/librechat version v0.7.5-rc2, specifically within the /api/files endpoint. This vulner…EPSS 0.99%9.0CVE-2026-33265Librechat vulnerabilityIn LibreChat 0.8.1-rc2, a logged-in user obtains a JWT for both the LibreChat API and the RAG API.EPSS 0.25%8.8CVE-2025-8850Librechat vulnerabilityIn danny-avila/librechat version 0.7.9, there is an insecure API design issue in the 2-Factor Authentication (2FA) flow. The system allows users to d…EPSS 0.42%8.8CVE-2024-11170Librechat vulnerabilityA vulnerability in danny-avila/librechat version git 81f2936 allows for path traversal due to improper sanitization of file paths by the multer middl…EPSS 1.8%

Source: NIST National Vulnerability Database (record CVE-2026-54030), CISA KEV, FIRST EPSS (scores of 2026-09-27). This page is refreshed as NVD updates the record.