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Suggestion detail

Untriaged
Permalink CVE-2026-52844
7.5 HIGH
  • CVSS version (CVSS): 3.1
  • Attack Vector (AV): Network (N)
  • Attack Complexity (AC): Low (L)
  • Privileges Required (PR): None (N)
  • User Interaction (UI): None (N)
  • Scope (S): Unchanged (U)
  • Confidentiality (C): High (H)
  • Integrity (I): None (N)
  • Availability (A): None (N)
  • Modified Attack Vector (MAV): Network (N)
  • Modified Attack Complexity (MAC): Low (L)
  • Modified Privileges Required (MPR): None (N)
  • Modified User Interaction (MUI): None (N)
  • Modified Confidentiality (MC): High (H)
  • Modified Scope (MS): Unchanged (U)
  • Modified Integrity (MI): None (N)
  • Modified Availability (MA): None (N)
created 2 months ago Activity log
  • Created suggestion 2 months ago
Caddy: Windows `file_server` path authorization bypass via encoded backslash

Caddy is an extensible server platform that uses TLS by default. Prior to 2.11.4, on Windows, Caddy path matchers treat /private\secret.txt as outside /private/*, but file_server later resolves the same request path as private\secret.txt on disk. An unauthenticated remote client can bypass Caddy path-scoped auth/deny routes protecting /private/*. This vulnerability is fixed in 2.11.4.

Affected products

caddy
  • ==< 2.11.4

Matching in nixpkgs

pkgs.caddy

Fast and extensible multi-platform HTTP/1-2-3 web server with automatic HTTPS

  • nixos-unstable -
  • nixos-26.05 -

pkgs.xcaddy

Build Caddy with plugins

  • nixos-unstable -
    • nixos-unstable-small 0.4.6
  • nixos-26.05 -
    • nixos-26.05-small 0.4.5