CVE-2026-39860 Nix sandbox escape: file write via symlink at FOD `.tmp` copy destination

Nix is a package manager for Linux and other Unix systems. A bug in the fix for CVE-2024-27297 allowed for arbitrary overwrites of files writable by the Nix process orchestrating the builds typically the Nix daemon running as root in multi-user installations by following symlinks during...

CVE-2026-39860

CVE-2026-39860 affects Nix, via a bug in the fix for CVE-2024-27297 that allowed arbitrary overwrites of files writable by the Nix build orchestrator (typically the root-running Nix daemon in multi-user setups) by following symlinks during fixed-output derivation output registration. Impact is li...