CVE Feed

    Dashboard / CVE / CVE-2026-104721

    CVE-2026-104721

    Path-traversal vulnerability in QOS.CH Sarl Logback-classic on Java (logback-classic module) allows path-traversal vulnerability. More specifically, an MDC-based discriminator value flows unsanitized into a nested FileAppender path, letting an attacker who influences that MDC value (e.g. via an HTTP header) create and append log files outside the intended directory. This issue affects Logback-classic: from 0.9.14 through 1.6.4.  This vulnerability is similar to CVE-2026-19880 but involves other attack techniques.

    Published:Oct 2, 2026
    Last Modified:Oct 4, 2026
    EPS:Oct 2, 2026
    EPSS Score:0.00332
    CVSS Score:5.6

    Affected Products

    Vendor
    Qos.ch Sarl
    Product
    Logback-classic

    Exploits

    No exploit reference

    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