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CVE-2026-54030

LibreChat: Missing Resource Parameter Validation in MCP OAuth Flow PUBLISHED

Description (CNA)

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 (CNA)

Vendor / productVersions
danny-avila / LibreChataffected < 0.8.5

CWE

CWE-346

References

ADP enrichment

CISA-ADP

No English description supplied.