Nixpkgs Security Tracker

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Permalink CVE-2026-30851

8.1 HIGH

CVSS version: 3.1
Attack vector (AV): NETWORK
Attack complexity (AC): LOW
Privileges required (PR): LOW
User interaction (UI): NONE
Scope (S): UNCHANGED
Confidentiality impact (C): HIGH
Integrity impact (I): HIGH
Availability impact (A): NONE

updated 2 weeks ago by @mweinelt Activity log

Created automatic suggestion 2 weeks ago
@mweinelt removed
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 weeks ago
@mweinelt dismissed 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.

References

https://github.com/caddyserver/caddy/security/advisories/GHSA-7r4p-vjf4-gxv4 x_refsource_CONFIRM
https://github.com/caddyserver/caddy/issues/6610 x_refsource_MISC
https://github.com/caddyserver/caddy/pull/6608 x_refsource_MISC
https://github.com/caddyserver/caddy/pull/7545 x_refsource_MISC

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

nixos-unstable 2.11.1
- nixpkgs-unstable 2.11.1
- nixos-unstable-small 2.11.2
nixos-25.11 2.10.2
- nixos-25.11-small 2.11.1
- nixpkgs-25.11-darwin 2.10.2

Ignored packages (7)

pkgs.xcaddy

Build Caddy with plugins

nixos-unstable 0.4.5
- nixpkgs-unstable 0.4.5
- nixos-unstable-small 0.4.5
nixos-25.11 0.4.5
- nixos-25.11-small 0.4.5
- nixpkgs-25.11-darwin 0.4.5

pkgs.caddyfile-language-server

Basic language server for caddyfile

nixos-unstable 0.4.0
- nixpkgs-unstable 0.4.0
- nixos-unstable-small 0.4.0

pkgs.vimPlugins.nvim-treesitter-parsers.caddy

None

nixos-unstable 0.0.0+rev=2686186
- nixpkgs-unstable 0.0.0+rev=2686186
- nixos-unstable-small 0.0.0+rev=2686186
nixos-25.11 -
- nixos-25.11-small
- nixpkgs-25.11-darwin

pkgs.tree-sitter-grammars.tree-sitter-caddyfile

Tree-sitter grammar for caddyfile

nixos-unstable 0-unstable-2025-12-16
- nixpkgs-unstable 0-unstable-2025-12-16
- nixos-unstable-small 0-unstable-2025-12-16

pkgs.vscode-extensions.matthewpi.caddyfile-support

Rich Caddyfile support for Visual Studio Code

nixos-unstable 0.4.0
- nixpkgs-unstable 0.4.0
- nixos-unstable-small 0.4.0
nixos-25.11 0.4.0
- nixos-25.11-small 0.4.0
- nixpkgs-25.11-darwin 0.4.0

pkgs.python313Packages.tree-sitter-grammars.tree-sitter-caddyfile

Python bindings for tree-sitter-caddyfile

nixos-unstable 0+unstable20251216
- nixpkgs-unstable 0+unstable20251216
- nixos-unstable-small 0+unstable20251216

pkgs.python314Packages.tree-sitter-grammars.tree-sitter-caddyfile