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    CVE-2022-34037

    An out-of-bounds read in the rewrite function at /modules/caddyhttp/rewrite/rewrite.go in Caddy v2.5.1 allows attackers to cause a Denial of Service (DoS) via a crafted URI. Note: This has been disputed as a bug, not a security vulnerability, in the Caddy web server that emerged when an administrator's bad configuration containing a malformed request URI caused the server to return an empty reply instead of a valid HTTP response to the client.

    Published:Jul 22, 2022
    Last Modified:Nov 21, 2024
    EPS:Jul 22, 2022
    EPSS Score:0.0073
    CVSS Score:7.5

    Affected Products

    Vendor
    Caddyserver
    Product
    Caddy

    Exploits

    https://github.com/caddyserver/caddy/issues/4775https://github.com/caddyserver/caddy/issues/4775

    Common Weakness Enumeration

    CWE-125 Out-of-bounds Read

    Common Attack Pattern Enumeration and Classification (CAPEC)

    CAPEC-540 Overread Buffers

    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