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    CVE-2018-21246

    Caddy before 0.10.13 mishandles TLS client authentication, as demonstrated by an authentication bypass caused by the lack of the StrictHostMatching mode.

    Published:Jun 15, 2020
    Last Modified:Nov 21, 2024
    EPS:Jun 15, 2020
    EPSS Score:0.00669
    CVSS Score:9.8

    Affected Products

    Vendor
    Caddyserver
    Product
    Caddy

    Exploits

    No exploit reference

    Common Weakness Enumeration

    CWE-287 Improper Authentication

    Related CVEs

    CVE-2026-45135 (CVSS 8.1) — Caddy is an extensible server platform that uses TLS by default. From 2.7.0 until 2.11.3, the FastCGI transpor…
    CVE-2026-45692 (CVSS 5.4) — Caddy is an extensible server platform that uses TLS by default. From 2.4.0 until 2.11.3, the authorization la…
    CVE-2026-52845 (CVSS 8.1) — Caddy is an extensible server platform that uses TLS by default. Prior to 2.11.4, forward_auth copy_headers de…
    CVE-2026-52844 (CVSS 7.5) — Caddy is an extensible server platform that uses TLS by default. Prior to 2.11.4, on Windows, Caddy path match…
    CVE-2026-52846 (CVSS 4.2) — Caddy is an extensible server platform that uses TLS by default. Prior to 2.11.4, Caddy’s stripHTML template f…
    CVE-2026-30851 (CVSS 8.1) — Caddy is an extensible server platform that uses TLS by default. From version 2.10.0 to before version 2.11.2,…
    CVE-2026-30852 (CVSS 5.5) — Caddy is an extensible server platform that uses TLS by default. From version 2.7.5 to before version 2.11.2, …
    CVE-2026-27590 (CVSS 8.9) — Caddy is an extensible server platform that uses TLS by default. Prior to version 2.11.1, Caddy's FastCGI path…
    CVE-2026-27589 (CVSS 6.9) — Caddy is an extensible server platform that uses TLS by default. Prior to version 2.11.1, the local caddy admi…
    CVE-2026-27588 (CVSS 7.7) — Caddy is an extensible server platform that uses TLS by default. Prior to version 2.11.1, Caddy's HTTP `host` …

    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