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    CVE-2026-54030

    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.

    Published:Jun 25, 2026
    Last Modified:Jun 26, 2026
    EPS:Jun 25, 2026
    EPSS Score:
    CVSS Score:8

    Affected Products

    Vendor
    Danny-avila
    Product
    Libre Chat

    Exploits

    https://github.com/danny-avila/LibreChat/security/advisories/GHSA-gvpj-vm2f-2m23https://github.com/danny-avila/LibreChat/security/advisories/GHSA-gvpj-vm2f-2m23

    Common Weakness Enumeration

    CWE-346 Origin Validation Error

    Related CVEs

    CVE-2026-54024 (CVSS 6.5) — LibreChat is an enhanced ChatGPT clone that supports multiple AI providers. Prior to 0.8.4-rc1, the fix for CV…
    CVE-2026-54025 (CVSS 5.4) — LibreChat is an enhanced ChatGPT clone that supports multiple AI providers. Prior to 0.8.4-rc1, there is a vul…
    CVE-2026-54027 (CVSS 6.5) — LibreChat is an enhanced ChatGPT clone that supports multiple AI providers. Prior to 0.8.4-rc1, the POST /api/…
    CVE-2026-54029 (CVSS 5.3) — LibreChat is an enhanced ChatGPT clone that supports multiple AI providers. Prior to 0.8.4-rc1, the DELETE /ap…
    CVE-2026-54033 (CVSS 7.7) — LibreChat is an enhanced ChatGPT clone that supports multiple AI providers. Prior to 0.8.4-rc1, LibreChat allo…
    CVE-2026-54037 (CVSS 6.5) — LibreChat is an enhanced ChatGPT clone that supports multiple AI providers. Prior to 0.8.4-rc1, the fix for CV…
    CVE-2026-54040 (CVSS 5.9) — LibreChat is an enhanced ChatGPT clone that supports multiple AI providers. Prior to 0.8.4-rc1, the POST /api/…
    CVE-2026-54036 (CVSS 5.3) — LibreChat is an enhanced ChatGPT clone that supports multiple AI providers. Prior to 0.8.4-rc1, the GET /api/a…
    CVE-2026-44654 (CVSS 5.7) — LibreChat is an enhanced ChatGPT clone that supports multiple AI providers. In versions up to and including 0.…
    CVE-2026-44653 (CVSS 6.5) — LibreChat is an enhanced ChatGPT clone that supports multiple AI providers. In versions up to and including 0.…

    Common Vulnerability Scoring System

    Attack Vector
    Network
    Adjacent
    Local
    Physical
    Privileges Required
    None
    Low
    High
    User Interaction
    None
    Required
    Scope
    Unchanged
    Changed
    Confidentiality
    None
    Low
    High
    Integrity
    None
    Low
    High
    Availability
    None
    Low
    High