Chocapikk/Windfall

Chocapikk/Windfall

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Windfall - Unauthenticated RCE exploit chain for Windmill & Nextcloud Flow (CVE-2026-29059). Path traversal + credential leak + PostgreSQL heap dump + Nextcloud AppAPI takeover.

CVE History

CVEPublishedCVSS v3CVSS v2
8.8 HIGH

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.

9.9 CRITICAL

Windmill CE and EE versions 1.276.0 through 1.603.2 contain an SQL injection vulnerability in the folder ownership management functionality that allows authenticated attackers to inject SQL through the owner parameter. An attacker can use the injection to read sensitive data such as the JWT signing secret and administrative user identifiers, forge an administrative token, and then execute arbitrary code via the workflow execution endpoints.