Vulnerability DatabaseCVE-2026-54030
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CVE-2026-54030
Published:June 25, 2026
Updated:June 29, 2026
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.
Affected Packages
https://github.com/danny-avila/LibreChat.git (GITHUB):
Affected version(s) >=v0.0.1 <v0.8.5
Fix Suggestion:
Update to version v0.8.5
Related Resources (1)
https://github.com/danny-avila/LibreChat/security/advisories/GHSA-gvpj-vm2f-2m23
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CVSS v4
Base Score:
8.8
Attack Vector
NETWORK
Attack Complexity
HIGH
Attack Requirements
NONE
Privileges Required
NONE
User Interaction
PASSIVE
Vulnerable System Confidentiality
HIGH
Vulnerable System Integrity
HIGH
Vulnerable System Availability
NONE
Subsequent System Confidentiality
HIGH
Subsequent System Integrity
HIGH
Subsequent System Availability
NONE
CVSS v3
Base Score:
8
Attack Vector
NETWORK
Attack Complexity
HIGH
Privileges Required
NONE
User Interaction
REQUIRED
Scope
CHANGED
Confidentiality
HIGH
Integrity
HIGH
Availability
NONE
Weakness Type (CWE)
Origin Validation Error
CWE-346
EPSS
Base Score:
0.11