CVE-2026-22683
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.
Does this matter?
High impact if exploited, but EPSS currently rates exploitation as unlikely (2.61%). Schedule it in the normal patch cycle and watch for a rise in EPSS or a public exploit.
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.
- CVSS 4.0
- 8.7 HIGHCVSS:4.0/AV:N/AC:L/AT:N/PR:L/UI:N/VC:H/VI:H/VA:H/SC:N/SI:N/SA:N/E:X/CR:X/IR:X/AR:X/MAV:X/MAC:X/MAT:X/MPR:X/MUI:X/MVC:X/M
- EPSS
- 2.61% probability · 85th percentile
- CISA KEV
- Not listed
- Weakness
- CWE-862
- Affected
- nextcloud/flow · windmill/windmill
- Source
- disclosure@vulncheck.com
References
- https://apps.nextcloud.com/apps/flow/releasesRelease Notes
- https://chocapikk.com/posts/2026/windfall-nextcloud-flow-windmill-rce/Vendor Advisory
- https://github.com/Chocapikk/WindfallProduct
- https://github.com/windmill-labs/windmill/commit/c621a74804f4f6e8318819c01e3a23a17698588bPatch
- https://github.com/windmill-labs/windmill/releases/tag/v1.615.0Release Notes
- https://www.windmill.dev/Product
Source: NVD record, EPSS from FIRST.org, KEV from CISA. Refreshed daily.