Vulnerability · Published Apr 7, 2026 · Assigned by VulnCheck
CVE-2026-23696Windmill < 1.603.3 File Ownership Handling SQLi RCE
Critical 9.9
In plain English
A critical-severity SQL injection in Windmill CE (Community Edition) from Windmill Labs. Proof-of-concept exploit code is public. The chance it is exploited in the next 30 days is estimated at 13.6% (higher than 96% of all known vulnerabilities). Ready-made attack tooling exists: Nuclei.
Official description
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.
Affected products (as reported)
| Vendor | Product | Versions |
|---|---|---|
| Windmill Labs | Windmill CE (Community Edition) | 1.276.0 – through 1.603.2 |
| Windmill Labs | Windmill EE (Enterprise Edition) | 1.276.0 – through 1.603.2 |
Weakness: CWE-89 · Vector: CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:C/C:H/I:H/A:H
References
- https://chocapikk.com/posts/2026/windfall-nextcloud-flow-windmill-rce/ technical-description, exploit
- https://github.com/Chocapikk/Windfall exploit
- https://github.com/windmill-labs/windmill/releases/tag/v1.603.3 release-notes
- https://github.com/windmill-labs/windmill/commit/942fb629210ebb287f48467d1535ffde3a3eeafe patch
- https://www.windmill.dev/ product
- https://apps.nextcloud.com/apps/flow/releases release-notes
- https://www.vulncheck.com/advisories/windmill-file-ownership-handling-sqli-rce third-party-advisory