CVE Feed

    Dashboard / CVE / CVE-2026-34763

    CVE-2026-34763

    Rack is a modular Ruby web server interface. Prior to versions 2.2.23, 3.1.21, and 3.2.6, Rack::Directory interpolates the configured root path directly into a regular expression when deriving the displayed directory path. If root contains regex metacharacters such as +, *, or ., the prefix stripping can fail and the generated directory listing may expose the full filesystem path in the HTML output. This issue has been patched in versions 2.2.23, 3.1.21, and 3.2.6.

    Published:Apr 2, 2026
    Last Modified:Apr 16, 2026
    EPS:Apr 2, 2026
    EPSS Score:0.00036
    CVSS Score:5.3

    Affected Products

    Vendor
    Rack
    Product
    Rack

    Exploits

    No exploit reference

    Common Attack Pattern Enumeration and Classification (CAPEC)

    CAPEC-3 Using Leading 'Ghost' Character Sequences to Bypass Input Filters

    Related CVEs

    CVE-2026-26962 (CVSS 4.8) — Rack is a modular Ruby web server interface. From version 3.2.0 to before version 3.2.6, Rack::Multipart::Pars…
    CVE-2026-34835 (CVSS 4.8) — Rack is a modular Ruby web server interface. From versions 3.0.0.beta1 to before 3.1.21, and 3.2.0 to before 3…
    CVE-2026-34827 (CVSS 7.5) — Rack is a modular Ruby web server interface. From versions 3.0.0.beta1 to before 3.1.21, and 3.2.0 to before 3…
    CVE-2026-32762 (CVSS 4.8) — Rack is a modular Ruby web server interface. From versions 3.0.0.beta1 to before 3.1.21 and 3.2.0 to before 3.…
    CVE-2026-34830 (CVSS 5.9) — Rack is a modular Ruby web server interface. Prior to versions 2.2.23, 3.1.21, and 3.2.6, Rack::Sendfile#map_a…
    CVE-2026-34829 (CVSS 7.5) — Rack is a modular Ruby web server interface. Prior to versions 2.2.23, 3.1.21, and 3.2.6, Rack::Multipart::Par…
    CVE-2026-34826 (CVSS 5.3) — Rack is a modular Ruby web server interface. Prior to versions 2.2.23, 3.1.21, and 3.2.6, Rack::Utils.get_byte…
    CVE-2026-34786 (CVSS 5.3) — Rack is a modular Ruby web server interface. Prior to versions 2.2.23, 3.1.21, and 3.2.6, Rack::Static#applica…
    CVE-2026-34785 (CVSS 7.5) — Rack is a modular Ruby web server interface. Prior to versions 2.2.23, 3.1.21, and 3.2.6, Rack::Static determi…
    CVE-2026-34831 (CVSS 4.8) — Rack is a modular Ruby web server interface. Prior to versions 2.2.23, 3.1.21, and 3.2.6, Rack::Files#fail set…

    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