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

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CRITICAL

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

Published May 14, 2026

9.4

CRITICAL

CVSS 3.1

EPSS 0.22%

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

Vendor Wavelens Product Gradient Default
n/a
- Version
  1.1.0
  Status
  affected
  Constraints
  -

Default status is the baseline for the product, each version can override it (e.g. patched versions marked unaffected).

Vendor

Product

Default status

Versions

n/a

Version	Status	Constraints
1.1.0	affected	-

Remediation

No remediation recorded yet.

Weaknesses (3)

CWE-306

Missing Authentication

CWE-345

CWE-862

Missing Authorization

References (1)

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

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

Change history (0)

No recorded changes yet.

Sources

CVE.org / MITRE

Status PUBLISHED

Assigner GitHub_M

Published May 14, 2026

Updated May 16, 2026

Reserved May 6, 2026

Link CVE-2026-44592

CISA Vulnrichment

Updated May 16, 2026

Status Deferred

Modified Jun 17, 2026

Link CVE-2026-44592

Severity n/a

Public date n/a

Links CVE-2026-44592