PT-2026-30913 · Nextcloud+1 · Flow+2

Valentin Lobstein · Published 2026-04-07 · Updated 2026-04-07 · CVE-2026-22683

NVD

CVSS v3.1

8.8

High

AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H

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.

Exploit

Fix

Missing Authorization

Weakness Enumeration

CWE-862

Related Identifiers

CVE-2026-22683

Affected Products

Flow

Windmill Ce

Windmill Ee

References · 7

• 🔥 https://github.com/Chocapikk/Windfall · Exploit
• 🔥 https://chocapikk.com/posts/2026/windfall-nextcloud-flow-windmill-rce · Exploit
• https://github.com/windmill-labs/windmill/commit/c621a74804f4f6e8318819c01e3a23a17698588b · Patch
• https://nvd.nist.gov/vuln/detail/CVE-2026-22683 · Security Note
• https://apps.nextcloud.com/apps/flow/releases · Note
• https://windmill.dev · Note
• https://github.com/windmill-labs/windmill/releases/tag/v1.615.0 · Note