CVE-2026-44592 CRITICAL

CVE-2026-44592: Gradient: Unauthenticated worker on /proto → arbitrary NAR write / cache poisoning

Vendor Wavelens
Product gradient
Weakness CWE-306 · Missing auth
Published May 14, 2026
Last update May 16, 2026
View on NVD All CVEs

CVSS base score

9.4/10
Attack vector Network
Attack complexity Low
Privileges required None
User interaction None
Confidentiality Low
Integrity High

CVSS vector

CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:L/I:H/A:H

What the vulnerability does

01Description

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.

Key dates

02Disclosure timeline

May 14, 2026 CVE published
May 16, 2026 Record updated