Description
Windmill versions 1.56.0 through 1.614.0 contain a missing authorization vulnerability that allows users with the Operator role to perform prohibited entity creation and modification actions via the backend API. Although Operators are documented and priced as unable to create or modify entities, the API does not enforce the Operator restriction on workspace endpoints, allowing an Operator to create and update scripts, flows, apps, and raw_apps. Since Operators can also execute scripts via the jobs API, this allows direct privilege escalation to remote code execution within the Windmill deployment. This vulnerability has existed since the introduction of the Operator role in version 1.56.0.
Affected products
| Vendor | Product | Affected | Fixed |
|---|---|---|---|
| Windmill Labs | Windmill CE (Community Edition) | 1.56.0 – ≤ 1.614.0 | 1.615.0 |
| Windmill Labs | Windmill EE (Enterprise Edition) | 1.56.0 – ≤ 1.614.0 | 1.615.0 |
Automated scanner template
A ready-made Nuclei template detects this vulnerability automatically. Vulnerabilities with public scanner templates are typically probed across the internet soon after the template appears — exposed systems should be patched first.
- Windmill < 1.603.3 - Operator Authorization Bypass http/cves/2026/CVE-2026-22683.yaml
Source: projectdiscovery/nuclei-templates (MIT) — updated daily. Only links are listed.
References
- https://chocapikk.com/posts/2026/windfall-nextcloud-flow-windmill-rce/ technical-description exploit
- https://github.com/Chocapikk/Windfall exploit
- Windmill 1.615.0 Release Notes release-notes
- https://github.com/windmill-labs/windmill/commit/c621a74804f4f6e8318819c01e3a23a17698588b patch
- https://www.windmill.dev/ product
- https://apps.nextcloud.com/apps/flow/releases release-notes