NixOS is a Linux distribution built on top of the Nix package manager. It is completely declarative, its system configurations are reproducible, makes configuration changes reliable and atomic, and eliminates configuration drift.

NixOS

Homebrew is a free and open-source software package management system that simplifies the installation of software on Apple's macOS operating system and Linux. The name is intended to suggest the idea of building software on the Mac depending on the user's taste. Originally written by Max Howell, the package manager has gained popularity in the Ruby on Rails community and earned praise for its extensibility.

Homebrew

The file downloading functionality in the Atlassian Companion App before version 1.0.0 allows remote attackers, who control a Confluence Server instance that the Companion App is connected to, execute arbitrary .exe files via a Protection Mechanism Failure.

CVE ID	Severity	Score	Technologies	Component name	CISA KEV exploit	Has fix	Published date
CVE-2026-75874	CRITICAL	10	NixOS	cpe:2.3:a:mozilla:firefox	No	Yes	Aug 18, 2026
CVE-2026-74990	CRITICAL	9.8	NixOS	cpe:2.3:a:mozilla:firefox	No	Yes	Aug 18, 2026
CVE-2026-74989	CRITICAL	9.8	NixOS	cpe:2.3:a:mozilla:firefox	No	Yes	Aug 18, 2026
CVE-2026-74988	CRITICAL	9.8	NixOS	thunderbird	No	Yes	Aug 18, 2026
CVE-2026-74987	CRITICAL	9.8	NixOS	MozillaFirefox-branding-upstream	No	Yes	Aug 18, 2026

CVE-2020-4020:
NixOS vulnerability analysis and mitigation

7.2

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CVE-2020-4020: NixOS vulnerability analysis and mitigation