CVE-2026-44592

Critical

Description

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.

SeverityCritical

CVSS9.4

Exploit probability—

ProductWavelens Gradient

PublishedMay 14, 2026

First seenMay 14, 2026

Weakness typeCWE-306Missing authentication for critical function CWE-345CWE-345 CWE-862Missing authorization

How to fix

Sources list no fixed version or patch link for this vulnerability.

Affected products

Product	Affected versions	Fixed in
wavelens gradient	1.1.0	—

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