NIXPKGS-2026-0353

GitHub issue published on 27 Feb 2026

Permalink CVE-2026-27589

updated 3 weeks, 2 days ago by @LeSuisse Activity log

Created automatic suggestion 3 weeks, 3 days ago
@LeSuisse 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
3 weeks, 2 days ago
@LeSuisse accepted 3 weeks, 2 days ago
@LeSuisse removed
4 maintainers
- @ryan4yin
- @techknowlogick
- @Br1ght0ne
- @stepbrobd
3 weeks, 2 days ago
@LeSuisse published on GitHub 3 weeks, 2 days ago

Caddy vulnerable to cross-origin config application via local admin API /load (caddy)

Caddy is an extensible server platform that uses TLS by default. Prior to version 2.11.1, the local caddy admin API (default listen `127.0.0.1:2019`) exposes a state-changing `POST /load` endpoint that replaces the entire running configuration. When origin enforcement is not enabled (`enforce_origin` not configured), the admin endpoint accepts cross-origin requests (e.g., from attacker-controlled web content in a victim browser) and applies an attacker-supplied JSON config. This can change the admin listener settings and alter HTTP server behavior without user intent. Version 2.11.1 contains a fix for the issue.

References

https://github.com/user-attachments/files/25079818/poc.zip x_refsource_MISC
https://github.com/user-attachments/files/25079820/PR_DESCRIPTION.md x_refsource_MISC
https://github.com/caddyserver/caddy/security/advisories/GHSA-879p-475x-rqh2 x_refsource_CONFIRM
https://github.com/caddyserver/caddy/releases/tag/v2.11.1 x_refsource_MISC

Affected products

caddy

==< 2.11.1

Matching in nixpkgs

pkgs.caddy

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

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