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.
CVE-2026-29059
This high-severity CVE scores 7.5 under NVD CVSS v3. EPSS exploit probability: 2.6%, top 16% of all CVEs by exploit prediction. GitHub Security Advisory data not yet ingested — confidence will rise once GHSA publishes (typical lag: hours to days for open-source ecosystem CVEs; never for infrastructure-only CVEs).
- High severity, but no confirmed exploitation yet
No vendor fix yet — apply a workaround or compensating control (WAF / firewall / segmentation) and watch for a patch.
- CVSS v3
- 7.5
- EG Score
- 7.5(medium)
- EG Risk
- 65(Attend)EG Risk 65/100SSVC: Attend
EG Risk is EchelonGraph's 0–100 priority score: it fuses intrinsic severity with real-world exploitation and automatability so you can rank equal-severity CVEs and fix the most dangerous first. Higher = act sooner. Distinct from the 0–10 EG Score (severity).
How it’s computedSeverity75% × 45%Exploitation40% × 40%Automatability100% × 15%Action: Remediate soon — notable exploitation risk. - EPSS PROB
- 3%
- EPSS %ILE
- 87%
- KEV
- Not listed
Published
March 6, 2026
Last Modified
June 17, 2026
Advisory Details (3)
Auto-updated Jun 12, 2026GitHub - Chocapikk/Windfall: Windfall - Unauthenticated RCE exploit chain for Windmill & Nextcloud Flow (CVE-2026-29059). Path traversal + credential leak + PostgreSQL heap dump + Nextcloud AppAPI takeover. · GitHub
https://github.com/Chocapikk/WindfallSUPERADMIN_SECRET (rarely used) can be accessed publicly on versions < 1.603.3 using RCE · Advisory · windmill-labs/windmill · GitHub
https://github.com/windmill-labs/windmill/security/advisories/GHSA-24fr-44f8-fqwgv1.603.3
Patch available: windmill-labs/windmill v1.603.3
https://github.com/windmill-labs/windmill/releases/tag/v1.603.3Weakness Classification(1)
MITRE Common Weakness Enumeration — the root-cause categories this CVE belongs to.
Data Freshness Timeline
(refreshed 6× in last 7d / 28× in last 30d)
Each row is a source pipeline that fetched or updated this CVE on that date, with what changed. For example, "NVD update" means NVD published or revised its analysis for this CVE; "MITRE cvelistV5" means we ingested or refreshed it from the CNA feed. Most recent first.
Showing the most recent 100 of 176 total refreshes for this CVE.
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Publicly available exploits
(2 references)Working exploit code is in the public domain (1 GitHub PoC). Defenders should treat patch urgency accordingly — public PoCs typically lead to mass-exploitation within 24-72 hours.
- GitHub PoCChocapikk/WindfallFirst seen Jan 11, 2026
Windfall - Unauthenticated RCE exploit chain for Windmill & Nextcloud Flow (CVE-2026-29059). Path traversal + credential leak + PostgreSQL heap dump + Nextcloud AppAPI takeover.
Open source ↗ - Nucleihttp/cves/2026/CVE-2026-29059.yamlFirst seen Jan 1, 2026
Windmill/Nextcloud Flow < 1.603.3 - Unauthenticated Path Traversal
Open source ↗
Frequently asked(5)
What is CVE-2026-29059?
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What is the CVSS score of CVE-2026-29059?
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Dependency Blast Radius
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