CVE
CVE-2026-44592
Gradient: Unauthenticated worker on /proto → arbitrary NAR write / cache poisoning
Gradient is a nix-based continuous integration system. In 1.1.0, when GRADIENTDISCOVERABLE=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 narstorage and the cached_path table. This vulnerability is fixed in 1.1.1.
Package Versions Affected
Package Version
patch Availability
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CVSS Version
Severity
Base Score
CVSS Version
Score Vector
C
H
U
9.4
-
3.1
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:L/I:H/A:H
C
H
U
0
-
3.1
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:L/I:H/A:H
C
H
U
-
Related Resources
No items found.
References
https://github.com/CVEProject/cvelistV5/tree/main/cves/2026/44xxx/CVE-2026-44592.json, https://github.com/wavelens/gradient/security/advisories/GHSA-49w6-gf3p-96m2, https://nvd.nist.gov/vuln/detail/CVE-2026-44592