CVE-2026-22683
Windmill < 1.615.0 Operator Role Missing Authorization Checks RCE
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.
INFO
Published Date :
April 7, 2026, 5:16 p.m.
Last Modified :
April 24, 2026, 4:49 p.m.
Remotely Exploit :
Yes !
Source :
[email protected]
CVSS Scores
| Score | Version | Severity | Vector | Exploitability Score | Impact Score | Source |
|---|---|---|---|---|---|---|
| CVSS 3.1 | HIGH | 83251b91-4cc7-4094-a5c7-464a1b83ea10 | ||||
| CVSS 3.1 | HIGH | [email protected] | ||||
| CVSS 4.0 | HIGH | 83251b91-4cc7-4094-a5c7-464a1b83ea10 | ||||
| CVSS 4.0 | HIGH | [email protected] |
Solution
- Update Windmill to version 1.614.1 or later.
- Review and enforce role-based access controls.
- Audit API access for unauthorized actions.
Public PoC/Exploit Available at Github
CVE-2026-22683 has a 1 public
PoC/Exploit available at Github.
Go to the Public Exploits tab to see the list.
References to Advisories, Solutions, and Tools
Here, you will find a curated list of external links that provide in-depth
information, practical solutions, and valuable tools related to
CVE-2026-22683.
| URL | Resource |
|---|---|
| https://apps.nextcloud.com/apps/flow/releases | Release Notes |
| https://chocapikk.com/posts/2026/windfall-nextcloud-flow-windmill-rce/ | Vendor Advisory |
| https://github.com/Chocapikk/Windfall | Product |
| https://github.com/windmill-labs/windmill/commit/c621a74804f4f6e8318819c01e3a23a17698588b | Patch |
| https://github.com/windmill-labs/windmill/releases/tag/v1.615.0 | Release Notes |
| https://www.windmill.dev/ | Product |
CWE - Common Weakness Enumeration
While CVE identifies
specific instances of vulnerabilities, CWE categorizes the common flaws or
weaknesses that can lead to vulnerabilities. CVE-2026-22683 is
associated with the following CWEs:
Common Attack Pattern Enumeration and Classification (CAPEC)
Common Attack Pattern Enumeration and Classification
(CAPEC)
stores attack patterns, which are descriptions of the common attributes and
approaches employed by adversaries to exploit the CVE-2026-22683
weaknesses.
We scan GitHub repositories to detect new proof-of-concept exploits. Following list is a collection of public exploits and proof-of-concepts, which have been published on GitHub (sorted by the most recently updated).
Windfall - Unauthenticated RCE exploit chain for Windmill & Nextcloud Flow (CVE-2026-29059). Path traversal + credential leak + PostgreSQL heap dump + Nextcloud AppAPI takeover.
cve exploit nextcloud path-traversal pentesting python rce security sql-injection windmill security-research cve-2026-29059 cve-2026-23696 cve-2026-22683
Python Ruby Shell Dockerfile
Results are limited to the first 15 repositories due to potential performance issues.
The following list is the news that have been mention
CVE-2026-22683 vulnerability anywhere in the article.
-
The Hacker News
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The following table lists the changes that have been made to the
CVE-2026-22683 vulnerability over time.
Vulnerability history details can be useful for understanding the evolution of a vulnerability, and for identifying the most recent changes that may impact the vulnerability's severity, exploitability, or other characteristics.
-
Initial Analysis by [email protected]
Apr. 24, 2026
Action Type Old Value New Value Added CPE Configuration OR *cpe:2.3:a:nextcloud:flow:*:*:*:*:*:*:*:* versions from (including) 1.0.0 up to (including) 1.2.2 *cpe:2.3:a:windmill:windmill:*:*:*:*:*:*:*:* versions from (including) 1.56.0 up to (including) 1.614.0 Added Reference Type VulnCheck: https://apps.nextcloud.com/apps/flow/releases Types: Release Notes Added Reference Type VulnCheck: https://chocapikk.com/posts/2026/windfall-nextcloud-flow-windmill-rce/ Types: Vendor Advisory Added Reference Type VulnCheck: https://github.com/Chocapikk/Windfall Types: Product Added Reference Type VulnCheck: https://github.com/windmill-labs/windmill/commit/c621a74804f4f6e8318819c01e3a23a17698588b Types: Patch Added Reference Type VulnCheck: https://github.com/windmill-labs/windmill/releases/tag/v1.615.0 Types: Release Notes Added Reference Type VulnCheck: https://www.windmill.dev/ Types: Product -
New CVE Received by [email protected]
Apr. 07, 2026
Action Type Old Value New Value Added 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. Added CVSS V4.0 AV:N/AC:L/AT:N/PR:L/UI:N/VC:H/VI:H/VA:H/SC:N/SI:N/SA:N/E:X/CR:X/IR:X/AR:X/MAV:X/MAC:X/MAT:X/MPR:X/MUI:X/MVC:X/MVI:X/MVA:X/MSC:X/MSI:X/MSA:X/S:X/AU:X/R:X/V:X/RE:X/U:X Added CVSS V3.1 AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H Added CWE CWE-862 Added Reference https://apps.nextcloud.com/apps/flow/releases Added Reference https://chocapikk.com/posts/2026/windfall-nextcloud-flow-windmill-rce/ Added Reference https://github.com/Chocapikk/Windfall Added Reference https://github.com/windmill-labs/windmill/commit/c621a74804f4f6e8318819c01e3a23a17698588b Added Reference https://github.com/windmill-labs/windmill/releases/tag/v1.615.0 Added Reference https://www.windmill.dev/