# CVE-2026-72539: Windmill Labs Windmill information disclosure in draft scripts

Source: https://junglewise.ai/threats/cve-2026-72539-windmill-labs-windmill-information-disclosure-in-draft-scripts  
Publisher: Junglewise Threat Intelligence, https://junglewise.ai/threats  
Published: 2026-08-11. Updated: 2026-09-25  
License: CC BY 4.0 with a link back

CVE-2026-72539 · Severity: medium · CVSS 6.5 · Published 2026-08-11

Windmill is an open-source developer platform used to create workflows and automate infrastructure scripts. A vulnerability allows any authenticated member of a workspace to access draft scripts that lack an owner, exposing plaintext database credentials and API keys stored within them. An attacker with workspace access can read sensitive credentials meant to be protected, potentially leading to unauthorized access to upstream systems and data theft.

Technologies: [Windmill Labs Windmill](https://junglewise.ai/threats/technologies/windmill). Vendors: [Windmill Labs](https://junglewise.ai/threats/vendors/windmill-labs).

## Quick answers

**Is CVE-2026-72539 exploited in the wild?** No. Junglewise Threat Intelligence has no report of CVE-2026-72539 being exploited in the wild.

**How severe is CVE-2026-72539?** Medium severity, with a CVSS score of 6.5, published 11 August 2026.

**Which products and versions are affected?** Windmill Labs Windmill through 1.783.0.

**Is there a fix for CVE-2026-72539?** No fixed version is recorded yet. Check the vendor's advisory in the references below. If you run it, Junglewise drafts a mitigation that fits your setup and applies it once you approve, with senior security engineers behind it.

**How is CVE-2026-72539 attacked?** It is attacked over the network, in a web application.

**Am I affected by CVE-2026-72539?** Check whether you run Windmill Labs Windmill at an affected version. Junglewise does that check for you around the clock: connect your code, cloud and domains, and it matches new vulnerabilities like this one against what you actually run and tells you when one reaches you.

## Technical details

An information disclosure vulnerability exists in the draft scripts endpoint due to improper access control list (ACL) enforcement. Draft scripts with a null owner email bypass ACL checks and are returned to any authenticated workspace member querying the drafts endpoint. The vulnerability stems from inadequate validation of ownership before returning draft objects containing plaintext resource credentials. Attack requires valid workspace authentication but no additional privilege escalation. An attacker can enumerate and read all ownerless drafts, extracting credentials for databases, APIs, and other integrated resources. The issue is tracked as CVE-2026-72539 and affects Windmill through version 1.783.0.

## Affected products

- Windmill Labs Windmill through 1.783.0

## Timeline

- 2026-08-11: disclosed

## References

- [https://github.com/windmill-labs/windmill](https://github.com/windmill-labs/windmill)

## Related threats

- [Windmill Labs Windmill authorization bypass in job metrics](https://junglewise.ai/threats/cve-2026-72542-windmill-labs-windmill-authorization-bypass-in-job-metrics)
- [Windmill Labs Windmill authorization bypass in resource type update](https://junglewise.ai/threats/cve-2026-72541-windmill-labs-windmill-authorization-bypass-in-resource-type)
- [Windmill incorrect default permissions in nsjail sandbox configuration](https://junglewise.ai/threats/cve-2026-47107-windmill-incorrect-default-permissions-in-nsjail-sandbox)