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Permalink CVE-2026-30851
8.1 HIGH
  • CVSS version (CVSS): 3.1
  • Attack Vector (AV): Network (N)
  • Attack Complexity (AC): Low (L)
  • Privileges Required (PR): Low (L)
  • User Interaction (UI): None (N)
  • Scope (S): Unchanged (U)
  • Confidentiality (C): High (H)
  • Integrity (I): High (H)
  • Availability (A): None (N)
  • Modified Attack Vector (MAV): Network (N)
  • Modified Attack Complexity (MAC): Low (L)
  • Modified Privileges Required (MPR): Low (L)
  • Modified User Interaction (MUI): None (N)
  • Modified Confidentiality (MC): High (H)
  • Modified Scope (MS): Unchanged (U)
  • Modified Integrity (MI): High (H)
  • Modified Availability (MA): None (N)
updated 2 months, 2 weeks ago by @mweinelt Activity log
  • Created suggestion 2 months, 2 weeks ago
  • @mweinelt ignored
    7 packages
    • xcaddy
    • caddyfile-language-server
    • vimPlugins.nvim-treesitter-parsers.caddy
    • tree-sitter-grammars.tree-sitter-caddyfile
    • vscode-extensions.matthewpi.caddyfile-support
    • python313Packages.tree-sitter-grammars.tree-sitter-caddyfile
    • python314Packages.tree-sitter-grammars.tree-sitter-caddyfile
    2 months, 2 weeks ago
  • @mweinelt dismissed 2 months, 2 weeks ago
Caddy forward_auth copy_headers Does Not Strip Client-Supplied Headers, Allowing Identity Injection and Privilege Escalation

Caddy is an extensible server platform that uses TLS by default. From version 2.10.0 to before version 2.11.2, forward_auth copy_headers does not strip client-supplied headers, allowing identity injection and privilege escalation. This issue has been patched in version 2.11.2.

Affected products

caddy
  • ==>= 2.10.0, < 2.11.2

Matching in nixpkgs

pkgs.caddy

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

Ignored packages (7)

Package maintainers

NixOS Unstable: https://github.com/NixOS/nixpkgs/pull/497116
NixOS 25.11: https://github.com/NixOS/nixpkgs/pull/497197
Permalink CVE-2026-30852
updated 2 months, 2 weeks ago by @mweinelt Activity log
  • Created suggestion 2 months, 2 weeks ago
  • @mweinelt ignored
    7 packages
    • xcaddy
    • caddyfile-language-server
    • vimPlugins.nvim-treesitter-parsers.caddy
    • tree-sitter-grammars.tree-sitter-caddyfile
    • vscode-extensions.matthewpi.caddyfile-support
    • python313Packages.tree-sitter-grammars.tree-sitter-caddyfile
    • python314Packages.tree-sitter-grammars.tree-sitter-caddyfile
    2 months, 2 weeks ago
  • @mweinelt dismissed 2 months, 2 weeks ago
Caddy: vars_regexp double-expands user input, leaking env vars and files

Caddy is an extensible server platform that uses TLS by default. From version 2.7.5 to before version 2.11.2, the vars_regexp matcher in vars.go:337 double-expands user-controlled input through the Caddy replacer. When vars_regexp matches against a placeholder like {http.request.header.X-Input}, the header value gets resolved once (expected), then passed through repl.ReplaceAll() again (the bug). This means an attacker can put {env.DATABASE_URL} or {file./etc/passwd} in a request header and the server will evaluate it, leaking environment variables, file contents, and system info. This issue has been patched in version 2.11.2.

Affected products

caddy
  • ==>= 2.7.5, < 2.11.2

Matching in nixpkgs

pkgs.caddy

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

Ignored packages (7)

Package maintainers

NixOS Unstable: https://github.com/NixOS/nixpkgs/pull/497116
NixOS 25.11: https://github.com/NixOS/nixpkgs/pull/497197