CVE-2026-61828: Nixos Nixpkgs

High severity, CVSS 8.5. EPSS: 0.2% chance of exploitation in the next 30 days.

Nixpkgs is a collection of software packages that can be installed with the Nix package manager. Prior to the 25.11 and 26.05 channel fixes, the NixOS module for MySQL services.mysql initializes the MySQL database in a way that allows local users, such as unprivileged web or CGI processes on the same host, to log in as the root user without a password when the service is used with mysql or percona-server. This issue is fixed in the 25.11 and 26.05.

Affected products

• Nixos Nixpkgs: before 25.11 (fixed in 25.11); from 26.05-beta, before 26.05 (fixed in 26.05)

Published 2026-07-15. Last modified 2026-07-15.