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    CVE-2026-80230

    When `CURLOPT_PINNEDPUBLICKEY` is configured alongside options that disable standard peer verification (`CURLOPT_SSL_VERIFYPEER = 0` and `CURLOPT_SSL_VERIFYHOST = 0`), libcurl fails to enforce public key pinning on connections established without a presented server certificate. Bypassing the pinning check under these disabled-verification conditions allows unauthenticated connections to succeed when they should be rejected.

    Published:Sep 6, 2026
    Last Modified:Sep 8, 2026
    EPS:Sep 6, 2026
    EPSS Score:0.00142
    CVSS Score:7.5

    Affected Products

    Vendor
    Curl
    Product
    Curl

    Exploits

    No exploit reference

    Common Weakness Enumeration

    CWE-295 Improper Certificate Validation

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    Common Vulnerability Scoring System

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