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    CVE-2026-12773

    A weakness has been identified in BerriAI litellm up to 1.59.8. Affected is the function UserAPIKeyAuth of the file litellm/proxy/_experimental/mcp_server/auth/user_api_key_auth_mcp.py of the component MCP Proxy. Executing a manipulation can lead to improper authentication. The attack may be launched remotely. The exploit has been made available to the public and could be used for attacks. The vendor was contacted early about this disclosure.

    Published:Jun 21, 2026
    Last Modified:Jun 22, 2026
    EPS:Jun 21, 2026
    EPSS Score:0.00598
    CVSS Score:7.3

    Affected Products

    Vendor
    Litellm
    Product
    Litellm

    Exploits

    https://gist.github.com/YLChen-007/3cfaad10a69d7a15e4d4d458cb53309ehttps://vuldb.com/submit/811282https://vuldb.com/submit/811282

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    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