What’s Vulnerable › Vulnerabilities
CVE-2026-44592: Gradient: Unauthenticated worker on /proto → arbitrary NAR write / cache poisoning
- Severity: critical (CVSS 9.4 v3.1)
- Exploited in the wild: not listed in CISA KEV
- EPSS: 0.2% probability of exploitation in the next 30 days
- Public exploit or detection template: none known
- Published: 2026-05-14 · updated 2026-10-26
- Weakness: CWE-306
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.
Affected products
- wavelens gradient: 1.1.0
References
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