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    CVE-2026-25891

    Fiber is an Express inspired web framework written in Go. A Path Traversal (CWE-22) vulnerability in Fiber allows a remote attacker to bypass the static middleware sanitizer and read arbitrary files on the server file system on Windows. This affects Fiber v3 through version 3.0.0. This has been patched in Fiber v3 version 3.1.0.

    Published:Feb 24, 2026
    Last Modified:Apr 18, 2026
    EPS:Feb 24, 2026
    EPSS Score:0.00035
    CVSS Score:7.5

    Affected Products

    Vendor
    Gofiber
    Product
    Fiber

    Exploits

    https://github.com/gofiber/fiber/pull/4064https://github.com/gofiber/fiber/security/advisories/GHSA-m3c2-496v-cw3v

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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