CVE-2026-44592
Gradient: Unauthenticated worker on /proto → arbitrary NAR write / cache poisoning
CVSS Score
9.4
EPSS Score
0.0%
EPSS Percentile
0th
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.
| CWE | CWE-306 CWE-345 CWE-862 |
| Vendor | wavelens |
| Product | gradient |
| Published | May 14, 2026 |
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CVSS v3 Breakdown
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:L/I:H/A:H Attack Vector
Network
Attack Complexity
Low
Privileges Required
None
User Interaction
None
Scope
Unchanged
Confidentiality
Low
Integrity
High
Availability
High
Affected Versions
wavelens / gradient
1.1.0