LibreChat: Missing Resource Parameter Validation in MCP OAuth Flow
Default status is the baseline for the product, each version can override it (e.g. patched versions marked unaffected).
| Vendor | Product | Default status | Versions | ||||||
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| danny-avila | LibreChat | affected |
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Configuration 1 [-]
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No data.
| Vendor | Product | Versions | ||||||||
|---|---|---|---|---|---|---|---|---|---|---|
| Danny-avila | Libre Chat |
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No CVSS v4.0
No CVSS v3.0
No CVSS v2
This CVE is not in the KEV list.
Exploit prediction score: < 1% (0.168% probability within 30 days)
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| Metrics |
ssvc
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| Type | Values Removed | Values Added |
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| First Time appeared |
Danny-avila
Danny-avila libre Chat |
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| Vendors & Products |
Danny-avila
Danny-avila libre Chat |
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| 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. | |
| Title | LibreChat: Missing Resource Parameter Validation in MCP OAuth Flow | |
| Weaknesses | CWE-346 | |
| References |
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| Metrics |
cvssV3_1
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