Is CVE-2026-29059 actively exploited?

Yes. Previdian has observed exploitation attempts targeting this CVE. Confidence is confirmed.

What exploitation activity has Previdian observed?

Previdian sensors have observed 16 exploitation attempts, 3 unique attacker IPs, and 3 countries targeting CVE-2026-29059. First observed Jul 03, 2026; last observed Aug 20, 2026.

Which versions are affected?

CVE-2026-29059 affects windmill-labs windmill. Reported affected version: < 1.603.3.

How should organizations remediate it?

Prioritize immediate patching and validate internet-facing exposure. Monitor for matching exploitation attempts in your environment.

No. CVE-2026-29059 is not currently listed in CISA KEV.

Vulnerability report

Active exploitation observed Confirmed confidence Not in CISA KEV

CVE-2026-29059

Q: How should organizations remediate it?

Prioritize immediate patching and validate internet-facing exposure. Monitor for matching exploitation attempts in your environment.

Q: Is it in CISA KEV?

No. CVE-2026-29059 is not currently listed in CISA KEV.

Windmill: SUPERADMIN_SECRET (rarely used) can be accessed publicly

windmill-labs / windmill · affected before 1.603.3

View live feed Monitor via API Watch CVE

Severity: CVSS 6.9 · Medium
Confidence: Confirmed
Exploit status: Observed in sensors
EPSS: 2.9%
First observed: 03 Jul 2026
Last observed: 20 Aug 2026

Decision summary

What security teams need to know first

Direct answers before the deeper technical record.

What it is

CVE-2026-29059 is an unauthenticated Windmill: SUPERADMIN_SECRET (rarely used) can be accessed publicly. Windmill is an open-source developer platform for internal code: APIs, background jobs, workflows and UIs. Prior...

Is it exploited?

Yes. Previdian sensors observed exploitation attempts with confirmed confidence.

Who is affected?

windmill-labs / windmill affected before 1.603.3.

What should we do?

Patch immediately, validate internet-facing exposure, and monitor for matching requests.

Overview

Windmill is an open-source developer platform for internal code: APIs, background jobs, workflows and UIs

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.

Vendor Product Affected Status

windmill-labs windmill Before 1.603.3 Affected

Published: 06 Mar 2026
Exploited Since: 03 Jul 2026
Attack vector: Remote
Complexity: Low
Privileges: None
User interaction: None

CVE References

CVE Record CVE.org · CVE Record https://www.cve.org/CVERecord?id=CVE-2026-29059
https://github.com/windmill-labs/windmill/security/advisories/GHSA-24fr-44f8-fqwg github.com · CVE Record https://github.com/windmill-labs/windmill/security/advisories/GHSA-24...
https://github.com/windmill-labs/windmill/releases/tag/v1.603.3 github.com · CVE Record https://github.com/windmill-labs/windmill/releases/tag/v1.603.3

Exploitation evidence

Why Previdian marks this CVE as exploited

Third-party attestation and first-party sensor observation are shown separately so teams can judge the evidence chain.

Exploited in the wild

TheHackerNews

Recorded 22 Jul 2026

Independent exploitation attestation added to the Previdian record.

Active exploitation observed

Previdian sensor

First observed 03 Jul 2026

First-party sensor telemetry confirms matching exploitation attempts.

Proof of concept available

Nuclei Templates

Recorded 12 Jun 2026

Public scanner or PoC coverage increases practical exploitability.

Known exploited vulnerability sources

Per-source evidence links for KEV attestations are available through the Previdian Pro API.

Learn about Pro API access

Source	Added
TheHackerNews First	2026-07-22 12:36 UTC
Previdian	2026-07-22 15:04 UTC

Operational indicators for this CVE are listed under Detection.

Sensor telemetry

First-party evidence of exploitation activity

Aggregate observations show the scale, recency, and distribution of activity without overstating sparse data.

Attempts observed

Unique attacker IPs

Attacker countries

JP · NL · US

Sensors observed

Exploitation attempts over the last 55 days

Daily events observed by Previdian sensors

Updated 25 Aug 2026

2 Jul 13 Jul 24 Jul 4 Aug 25 Aug

First observed 03 Jul 2026 · Last observed 20 Aug 2026

Pro adds sensor region and window summaries. Enterprise adds raw IPs, paths, User-Agents, and payloads.

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Detection

Operational artifacts and observed signals

Make the evidence actionable in scanner, SOC, and edge-control workflows.

Observed signals

Request targets: 4
User-Agents: 16

Raw values available in Pro and Enterprise.

Scanner coverage

Nuclei template detected 03 Jun 2026.

View Nuclei template

Virtual patch status

No Previdian virtual patch is currently available. Future rules ship for ModSecurity, Cloudflare, and AWS WAF.

Learn about virtual patches →

Attacker IP Indicators

Attacker IP indicators observed · available in Pro and Enterprise.

Sensor-derived attacker IP indicators are available to Pro and Enterprise accounts under Detection and through the Pro API.

Learn about Pro API access

Scanner Artifacts

Scanner and exploit-framework references linked to this CVE.

Scanner	Reference	Detected
Nuclei	https://github.com/projectdiscovery/nuclei-templates/blob/main/http/cves/2026/CVE-2026-29059.yaml	03 Jun 2026

Risk and context

Severity, weaknesses, and research context

CVSS v4.0

6.9 Medium

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

EPSS

2.9%

Weaknesses

Improper Limitation of a Pathname to a Restricted Directory ('Path Traversal') CWE-22

Recent mention · TheHackerNews

Hackers Exploit Windmill Flaw to Read Arbitrary Server Files Without Authentication

A high-severity security flaw impacting open-source developer platform Windmill has come under active exploitation in the wild, per VulnCheck. The vulnerability in question is CVE-2026-29059 (CVSS score: 7.5), a case of unauthenticated path traversal impacting Windmill's...

Read full advisory

All CVSS Scores

CVSS v4.0 6.9 Medium

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

CVSS v3.1 7.5 High

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

Potential Proof of Concepts

These PoCs are unverified and could contain malware. Use at your own risk.

Windmill/Nextcloud Flow < 1.603.3 - Unauthenticated Path Traversal

nuclei · Created Unknown

Timeline

From disclosure to observed exploitation

22 Jul 2026
Added to Previdian KEV Feed

High-confidence, third-party attested exploitation
03 Jul 2026
Observed by Previdian sensors

Evidence-backed exploitation signal
03 Jul 2026
Indicators of compromise added (5)

Indicators of compromise recorded
12 Jun 2026
Public PoC available

Public proof-of-concept code published
03 Jun 2026
Nuclei template available

Scanner coverage available
06 Mar 2026
CVE published

Vulnerability disclosed publicly
03 Mar 2026
CVE ID reserved

Identifier reserved by the CNA

Pro API

Automate this intelligence

Confidence, exploit status, sensor telemetry, PoCs, scanner integrations, mentions, and tags are available programmatically for VM, SOC, and CTI workflows.

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Evidence confidence and provenance
First-party sensor telemetry
PoC and scanner references
Affected versions and enrichment
Automation-ready JSON delivery

GET /api/v2/pro/kevs/CVE-2026-29059

Free JSON includes basic KEV fields

{
  "cve_id": "CVE-2026-29059",
  "confidence": "Confirmed",
  "cvss_score": 6.9,
  "cvss_estimated": false,
  "epss_score": 0.02945,
  "exploit_status": {
    "exploited_in_the_wild": true,
    "active_exploitation_observed": true
  },
  "sensor_telemetry": { "attempts": 16, "sensors": 4 }
}

Early warning alerts

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