NIXPKGS-2026-0045 published on 19 Jan 2026 CVE-2026-23829 updated 3 days, 2 hours ago by @LeSuisse Activity log Created automatic suggestion 3 days, 18 hours ago @LeSuisse accepted as draft 3 days, 2 hours ago @LeSuisse published on GitHub 3 days, 2 hours ago Mailpit has SMTP Header Injection via Regex Bypass Mailpit is an email testing tool and API for developers. Prior to version 1.28. Mailpit's SMTP server is vulnerable to Header Injection due to an insufficient Regular Expression used to validate `RCPT TO` and `MAIL FROM` addresses. An attacker can inject arbitrary SMTP headers (or corrupt existing ones) by including carriage return characters (`\r`) in the email address. This header injection occurs because the regex intended to filter control characters fails to exclude `\r` and `\n` when used inside a character class. Version 1.28.3 fixes this issue. Affected products mailpit ==< 1.28.3 Matching in nixpkgs pkgs.mailpit Email and SMTP testing tool with API for developers nixos-unstable 1.27.11 nixpkgs-unstable 1.27.11 nixos-unstable-small 1.27.11 nixos-25.05 1.24.2 nixos-25.05-small 1.24.2 nixpkgs-25.05-darwin 1.24.2 Package maintainers: 1 @stephank Stéphan Kochen <nix@stephank.nl>
CVE-2026-23829 updated 3 days, 2 hours ago by @LeSuisse Activity log Created automatic suggestion 3 days, 18 hours ago @LeSuisse accepted as draft 3 days, 2 hours ago @LeSuisse published on GitHub 3 days, 2 hours ago Mailpit has SMTP Header Injection via Regex Bypass Mailpit is an email testing tool and API for developers. Prior to version 1.28. Mailpit's SMTP server is vulnerable to Header Injection due to an insufficient Regular Expression used to validate `RCPT TO` and `MAIL FROM` addresses. An attacker can inject arbitrary SMTP headers (or corrupt existing ones) by including carriage return characters (`\r`) in the email address. This header injection occurs because the regex intended to filter control characters fails to exclude `\r` and `\n` when used inside a character class. Version 1.28.3 fixes this issue. Affected products mailpit ==< 1.28.3 Matching in nixpkgs pkgs.mailpit Email and SMTP testing tool with API for developers nixos-unstable 1.27.11 nixpkgs-unstable 1.27.11 nixos-unstable-small 1.27.11 nixos-25.05 1.24.2 nixos-25.05-small 1.24.2 nixpkgs-25.05-darwin 1.24.2 Package maintainers: 1 @stephank Stéphan Kochen <nix@stephank.nl>
pkgs.mailpit Email and SMTP testing tool with API for developers nixos-unstable 1.27.11 nixpkgs-unstable 1.27.11 nixos-unstable-small 1.27.11 nixos-25.05 1.24.2 nixos-25.05-small 1.24.2 nixpkgs-25.05-darwin 1.24.2