CVE-2026-44592
Gradient: Unauthenticated worker on /proto → arbitrary NAR write / cache poisoning
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.
INFO
Published Date :
May 14, 2026, 7:16 p.m.
Last Modified :
Oct. 26, 2026, 2:10 p.m.
Remotely Exploit :
Yes !
Source :
[email protected]
CVSS Scores
| Score | Version | Severity | Vector | Exploitability Score | Impact Score | Source |
|---|---|---|---|---|---|---|
| CVSS | 134c704f-9b21-4f2e-91b3-4a467353bcc0 | |||||
| CVSS 3.1 | CRITICAL | [email protected] |
Solution
- Update Gradient to version 1.1.1.
- Configure GRADIENT_DISCOVERABLE to false.
- Implement worker authentication and authorization.
References to Advisories, Solutions, and Tools
Here, you will find a curated list of external links that provide in-depth
information, practical solutions, and valuable tools related to
CVE-2026-44592.
| URL | Resource |
|---|---|
| https://github.com/wavelens/gradient/security/advisories/GHSA-49w6-gf3p-96m2 |
CWE - Common Weakness Enumeration
While CVE identifies
specific instances of vulnerabilities, CWE categorizes the common flaws or
weaknesses that can lead to vulnerabilities. CVE-2026-44592 is
associated with the following CWEs:
Common Attack Pattern Enumeration and Classification (CAPEC)
Common Attack Pattern Enumeration and Classification
(CAPEC)
stores attack patterns, which are descriptions of the common attributes and
approaches employed by adversaries to exploit the CVE-2026-44592
weaknesses.
We scan GitHub repositories to detect new proof-of-concept exploits. Following list is a collection of public exploits and proof-of-concepts, which have been published on GitHub (sorted by the most recently updated).
Results are limited to the first 15 repositories due to potential performance issues.
The following list is the news that have been mention
CVE-2026-44592 vulnerability anywhere in the article.
The following table lists the changes that have been made to the
CVE-2026-44592 vulnerability over time.
Vulnerability history details can be useful for understanding the evolution of a vulnerability, and for identifying the most recent changes that may impact the vulnerability's severity, exploitability, or other characteristics.
-
CVE Translated by [email protected]
Oct. 26, 2026
Action Type Old Value New Value Added Translation Title: gradient de wavelens, Description: Gradient es un sistema de integración continua basado en Nix. En la versión 1.1.0, cuando GRADIENT_DISCOVERABLE=true (el valor predeterminado, y el predeterminado del módulo NixOS), cualquiera que pueda acceder a /proto puede registrarse como un trabajador sin credenciales enviando un UUID de trabajador nuevo y nunca antes registrado. La sesión resultante tiene PeerAuth::Open, es decir, ve trabajos de cada organización y puede inmediatamente NarPush/NarUploaded rutas de almacenamiento arbitrarias en nar_storage y la tabla cached_path. Esta vulnerabilidad se corrige en la versión 1.1.1. -
CVE Modified by [email protected]
Jun. 17, 2026
Action Type Old Value New Value Added Affected [{'vendor': 'wavelens', 'product': 'gradient', 'versions': [{'status': 'affected', 'version': '1.1.0'}]}] -
CVE Modified by 134c704f-9b21-4f2e-91b3-4a467353bcc0
Jun. 17, 2026
Action Type Old Value New Value Added SSVC {'id': 'CVE-2026-44592', 'role': 'CISA Coordinator', 'options': [{'exploitation': 'none'}, {'automatable': 'yes'}, {'technicalImpact': 'partial'}], 'version': '2.0.3', 'timestamp': '2026-05-16T00:50:40.449652Z'} -
New CVE Received by [email protected]
May. 14, 2026
Action Type Old Value New Value Added 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. Added CVSS V3.1 AV:N/AC:L/PR:N/UI:N/S:U/C:L/I:H/A:H Added CWE CWE-345 Added CWE CWE-306 Added CWE CWE-862 Added Reference https://github.com/wavelens/gradient/security/advisories/GHSA-49w6-gf3p-96m2