CVE-2026-44592: Wavelens Gradient

Critical severity, CVSS 9.4. EPSS: 0.2% chance of exploitation in the next 30 days.

Gradient is a nix-based continuous integration system. In 1.1.0, when GRADIENT_DISCOVERABLE=true (the default, and the NixOS module default), anyone who can reach /proto can register as a worker without any credentials by sending a fresh, never-registered worker UUID. The resulting session has PeerAuth::Open, i.e. it sees jobs from every organisation, and can immediately NarPush/NarUploaded arbitrary store paths into nar_storage and the cached_path table. This vulnerability is fixed in 1.1.1.

Affected products

• Wavelens Gradient: version 1.1.0 only

Published 2026-05-14. Last modified 2026-06-17.