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    CVE-2026-72815

    go-chi chi versions >= 5.2.1 and before 5.3.0 contain an IP spoofing vulnerability in the RealIP middleware, which blindly trusts the first (leftmost) value of the X-Forwarded-For HTTP header. A remote attacker can bypass IP-based access control lists and rate-limiting mechanisms, and forge log entries, by supplying a spoofed IP address in the X-Forwarded-For header. The issue is fixed in version 5.3.0.

    Published:Aug 14, 2026
    Last Modified:Aug 18, 2026
    EPS:Aug 14, 2026
    EPSS Score:0.00397
    CVSS Score:6.9

    Affected Products

    Vendor
    Go-chi
    Product
    Chi

    Exploits

    https://github.com/Saku0512/CVE-2026-72815-poc

    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