CVE-2026-72539Network attack vectorHinoki check available

Credential disclosure via ownerless draft ACL bypass

Published Aug 11, 2026 · Updated Aug 11, 2026

Information disclosure in Windmill Labs Windmill through 1.783.0 allows remote authenticated users to read ownerless draft scripts. The drafts endpoint returns legacy records whose owner email is null without enforcing the workspace ACL, including plaintext resource credentials embedded in script content. Any workspace membership is sufficient, and exposed credentials can grant access to resources beyond the member's assigned ACLs.

CVSS severity6.5
Medium
EPSS probability0.30%
Next 30 days · Sep 16, 2026
Known exploitationUnconfirmed
Based on sourced intelligence
Hinoki checkAvailable
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Summary

What happened

Information disclosure in Windmill Labs Windmill through 1.783.0 allows remote authenticated users to read ownerless draft scripts. The drafts endpoint returns legacy records whose owner email is null without enforcing the workspace ACL, including plaintext resource credentials embedded in script content. Any workspace membership is sufficient, and exposed credentials can grant access to resources beyond the member's assigned ACLs.

The record

CVE
CVE-2026-72539
Published
Aug 11, 2026
Updated
Aug 11, 2026
Vendor
Windmill Labs
Product
Windmill
Classifications
CWE-200, T1552.001
Attack vector
network
Privileges
authenticated

Timeline

How it unfolded

  1. Aug 11, 2026CVE publishedPublication date reported by the CVE source.
  2. Aug 11, 2026Record updatedLatest update available in the CVE record.

Exploitability

Present is not the same as exploitable

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Is a vulnerable build present?

Compare these published version ranges with your installed build and any vendor patches.

  1. Affected versionversion=0 <=1.783.0

What conditions does exploitation require?

Attack vectornetwork
Required privilegesauthenticated

What is affected?

Windmill Labs · Windmillversion=0 <=1.783.0

Published CVSS scores

6.5TuranSecCVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:N/A:N

CVSS describes severity. EPSS estimates exploitation probability.

Attacks

What attackers are doing with it

Daily unique IPs observed by Shadowserver honeypots for known exploited vulnerabilities (KEVs). Missing observations do not establish an absence of attacks.

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No observations available

Sep 10, 2026Sep 16, 2026
Latest reporting daySep 16, 2026
Latest daily unique IPsUnavailable
Prior 30-day averageUnavailable
SourceShadowserver honeypots (KEV)
Vectornetwork
Privilegesauthenticated
Known exploitationUnconfirmed
Public exploitUnconfirmed

Weakness, pattern, technique

CWE-200Exposure of Sensitive Information to an Unauthorized Actor
T1552.001Credentials In Files

Public exploit references

No public exploit references are available in this record.

Labels summarize the accepted research assessment. They do not indicate a test against your environment.

Technologies

Your stack

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Your stack

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