CVE-2026-44592— Gradient: Unauthenticated worker on /proto → arbitrary NAR write / cache poisoning
Possible ATT&CK Techniques 3AI
T1530 · Data from Cloud Storage T1059 · Command and Scripting Interpreter T1190 · Exploit Public-Facing ApplicationGet alerts for future matching vulnerabilitiesLog in to subscribe
I. Basic Information for CVE-2026-44592
Vulnerability Information
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Vulnerability Title
Gradient: Unauthenticated worker on /proto → arbitrary NAR write / cache poisoning
Source: NVD (National Vulnerability Database)
Vulnerability 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.
Source: NVD (National Vulnerability Database)
CVSS Information
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:L/I:H/A:H
Source: NVD (National Vulnerability Database)
Vulnerability Type
关键功能的认证机制缺失
Source: NVD (National Vulnerability Database)
Vulnerability Title
Gradient 访问控制错误漏洞
Source: CNNVD (China National Vulnerability Database)
Vulnerability Description
Gradient是Wavelens开源的一个现代Nix持续集成系统。 Gradient 1.1.0版本存在访问控制错误漏洞，该漏洞源于未验证注册凭据，可能导致攻击者注册为工作节点并访问任意存储路径。
Source: CNNVD (China National Vulnerability Database)
CVSS Information
N/A
Source: CNNVD (China National Vulnerability Database)
Vulnerability Type
N/A
Source: CNNVD (China National Vulnerability Database)
Affected Products
II. Public POCs for CVE-2026-44592
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- https://github.com/wavelens/gradient/security/advisories/GHSA-49w6-gf3p-96m2x_refsource_CONFIRM
- https://nvd.nist.gov/vuln/detail/CVE-2026-44592
IV. Related Vulnerabilities
Same weakness: CWE-306
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Open WebUI: Unauthenticated RAG Configuration Disclosure - CVE-2026-45248
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V. Comments for CVE-2026-44592
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