CVE-2026-22683: nextcloud flow Missing Authorization

Vulnerability summary

CVE-2026-22683 is a high (CVSS 8.8) Missing Authorization vulnerability in nextcloud flow. EPSS estimates a 2.61% chance of exploitation in the next 30 days, higher than 85.1% of scored vulnerabilities. 2 public exploits are recorded.

Timeline

1. 07-04-2026
   PublishedVulnerability first disclosed.
2. 14-07-2026
   Last modifiedVulnerability information updated.

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.

• CWE-862Missing AuthorizationThe product does not perform an authorization check when an actor attempts to access a resource or perform an action.