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

CVSS 9.4 · Critical EPSS 0.02% · P4
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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)

Affected Products

VendorProductAffected VersionsCPESubscribe
wavelensgradient 1.1.0 -

II. Public POCs for CVE-2026-44592

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III. Intelligence Information for CVE-2026-44592

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IV. Related Vulnerabilities

Same weakness: CWE-306

V. Comments for CVE-2026-44592

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