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CVE-2026-44592: Gradient 1.1.0: Unauthorized Access to Continuous Integration System

CVE-2026-44592

Summary

The Gradient continuous integration system allows anyone to register as a worker without a password, giving them access to all jobs and the ability to upload arbitrary files. This is a security risk because it allows unauthorized access to sensitive data. To fix this issue, update to version 1.1.1 or later.

Original title

Original 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.

nvd CVSS3.1 9.4

Vulnerability type

CWE-306 Missing Authentication for Critical Function

CWE-345

CWE-862 Missing Authorization

https://github.com/wavelens/gradient/security/advisories/GHSA-49w6-gf3p-96m2

Published: 14 May 2026 · Updated: 30 May 2026 · First seen: 14 May 2026