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    <lastBuildDate>Mon, 12 Oct 2026 08:45:06 +0000</lastBuildDate>
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      <title>CVE-2026-44592 — Gradient: Unauthenticated worker on /proto → arbitrary NAR write / cache poisoning</title>
      <link>https://cve.radiocsirt.org/vuln/cve-2026-44592</link>
      <description>&lt;p&gt;&lt;strong&gt;Affected:&lt;/strong&gt; wavelens gradient&lt;/p&gt;
&lt;p&gt;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.&lt;/p&gt;</description>
      <content:encoded>&lt;p&gt;&lt;strong&gt;Affected:&lt;/strong&gt; wavelens gradient&lt;/p&gt;
&lt;p&gt;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.&lt;/p&gt;</content:encoded>
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