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

CVE-2026-44592

Gradient: Unauthenticated worker on /proto → arbitrary NAR write / cache poisoning PUBLISHED

Description (CNA)

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.

Affected (CNA)

Vendor / product	Versions
wavelens / gradient	affected 1.1.0

CWE

CWE-306, CWE-345, CWE-862

References

https://github.com/wavelens/gradient/security/advisories/GHSA-49w6-gf3p-96m2

ADP enrichment

CISA-ADP

No English description supplied.

No references supplied.