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Vulnerability record · CVE-2026-44592 · published 14 May 2026

CVE-2026-44592: Missing authentication for critical function vulnerability

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.

9.4 CVSS 3.1 Critical EPSS 0.22% · top 89.2% CWE-306 · Missing authentication for critical functionCWE-345 · Insufficient verification of data authenticity Deferred
9.4CVSS 3.1 base score
0.22%EPSS exploitation probability, 30 days
NoNot in CISA KEV
0Affected product versions listed by NVD
1References
17 Jun 2026Last modified by NVD

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.

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

References

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

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Source: NIST National Vulnerability Database (record CVE-2026-44592), CISA KEV, FIRST EPSS (scores of 2026-09-26). This page is refreshed as NVD updates the record.