What’s Vulnerable › Vulnerabilities

CVE-2026-22683: Windmill < 1.615.0 Operator Role Missing Authorization Checks RCE

• Severity: high (CVSS 8.8 v3.1)
• Exploited in the wild: not listed in CISA KEV
• EPSS: 2.6% probability of exploitation in the next 30 days
• Public exploit or detection template: yes
• Published: 2026-04-07 · updated 2026-10-26
• Weakness: CWE-862

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

• nextcloud Flow: from 1.0.0 through 1.2.2
• windmill-labs windmill: from 1.56.0 through 1.614.0

References

• https://apps.nextcloud.com/apps/flow/releases
• https://chocapikk.com/posts/2026/windfall-nextcloud-flow-windmill-rce/
• https://github.com/Chocapikk/Windfall
• https://github.com/windmill-labs/windmill/commit/c621a74804f4f6e8318819c01e3a23a17698588b
• https://github.com/windmill-labs/windmill/releases/tag/v1.615.0
• https://www.windmill.dev/

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