CVE-2026-29059
MediumExploitedPublic exploitWindmill: SUPERADMIN_SECRET (rarely used) can be accessed publicly
Published Mar 6, 2026 · Updated Sep 5, 2026 · Also known as GHSA-24fr-44f8-fqwg
Key Facts
Patch immediately- CVE-2026-29059 is a medium-severity vulnerability (CVSS 6.9 v4) affecting Windmill.
- It is exploited in the wild, listed in Industry KEV feed, CIRCL KEV since Jul 18, 2026. Public exploit code is available.
- EPSS estimates a 2.1% probability of exploitation in the next 30 days.
- Fixed versions are available, including Windmill 1.603.3.
- Brandefense priority: patch immediately, because it is listed as exploited in the wild.
CVSS v4
6.9
CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:L/VI:N/VA:N/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
EPSS (30-day exploit likelihood)
2.1%
Higher than 81.5% of all scored CVEs
Exploited in the wild
Yes
2 catalog listings
Public exploit code
Available
Proof-of-concept or weaponized module
Get the full CVE-2026-29059 brief as a PDF
Every affected product and fixed release, exploitation status and a first 24 hours response checklist, emailed within minutes.
Description
Windmill is an open-source developer platform for internal code: APIs, background jobs, workflows and UIs. Prior to version 1.603.3, an unauthenticated path traversal vulnerability exists in Windmill's get_log_file endpoint "(/api/w/{workspace}/jobs_u/get_log_file/{filename})". The filename parameter is concatenated into a file path without sanitization, allowing an attacker to read arbitrary files on the server using ../ sequences. This issue has been patched in version 1.603.3.
Known-Exploited Catalog Listings
| Catalog | Added | Remediation due | Ransomware use |
|---|---|---|---|
| Industry KEV feed | Jul 18, 2026 | n/a | Not reported |
| CIRCL KEV | Jul 22, 2026 | n/a | Not reported |
Required action: Apply remediations or mitigations per vendor instructions or discontinue use of the product if remediation or mitigations are unavailable.
Affected Products
2 affected entries in total| Product | Affected versions | Fixed in |
|---|---|---|
| WindmillWindmill | >= < 1.603.3 | 1.603.3 |
Patched Releases
Windmill
1.603.3
Timeline
Publicly disclosed
Mar 6, 2026
Added to Industry KEV feed
Jul 18, 2026
Added to CIRCL KEV
Jul 22, 2026
Last updated
Sep 5, 2026
Weakness Type
- CWE-22 Improper Limitation of a Pathname to a Restricted Directory ('Path Traversal')
References
- advisoryhttps://github.com/CVEProject/cvelistV5/tree/main/cves/2026/29xxx/CVE-2026-29059.json
- advisoryhttps://nvd.nist.gov/vuln/detail/CVE-2026-29059
- exploitVulnCheck exploitation report
- exploitVulnCheck exploitation report
- exploitVulnCheck exploitation report
FAQ
Common Questions.
Windmill is an open-source developer platform for internal code: APIs, background jobs, workflows and UIs.
Affected: Windmill versions >= < 1.603.3. The full list is in the CVE brief.
It is exploited in the wild, listed in Industry KEV feed, CIRCL KEV since Jul 18, 2026.
No, it is not currently listed in the CISA Known Exploited Vulnerabilities catalog.
Public exploit code is available.
Fixed versions are available, including Windmill 1.603.3.
Brandefense priority: patch immediately, because it is listed as exploited in the wild.
Is CVE-2026-29059 Running On Your Attack Surface?
Brandefense maps vulnerabilities like this one to your internet-facing assets and tells you exactly where to patch.
Request A Demo