CVE-2026-29059

High

Published: 06 March 2026

Published

06 March 2026

Modified

14 April 2026

KEV Added

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Patch

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CVSS Score 7.5 CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:N/A:N

EPSS Score 0.0002 5.3th percentile

Risk Priority 15 60% EPSS · 20% KEV · 20% CVSS

Summary

CVE-2026-29059 is a high-severity Path Traversal (CWE-22) vulnerability in Windmill Windmill. Its CVSS base score is 7.5 (High).

Operationally, exploitation aligns with the MITRE ATT&CK technique Exploit Public-Facing Application (T1190); ranked at the 5.3th percentile by exploit likelihood (below the median); it is not currently listed in the CISA KEV catalog.

Threat & Defense at a Glance

What attackers do: exploitation maps to Exploit Public-Facing Application (T1190) and 1 other technique.

Threat & Defense Details

Likely Mitigating ControlsAI

Per-CVE control mapping for this CVE has not run yet; the list below is derived from the weakness types (CWEs) cited in the NVD entry.

SI-10 Information Input Validation

addresses: CWE-22

Validates pathnames and filenames to prevent traversal outside intended directories.

MITRE ATT&CK Enterprise TechniquesAI

T1190 Exploit Public-Facing Application Initial Access

Adversaries may attempt to exploit a weakness in an Internet-facing host or system to initially access a network.

attack.mitre.org →

T1005 Data from Local System Collection

Adversaries may search local system sources, such as file systems, configuration files, local databases, virtual machine files, or process memory, to find files of interest and sensitive data prior to Exfiltration.

attack.mitre.org →

Why these techniques?

Unauthenticated path traversal in public-facing Windmill endpoint directly enables remote exploitation (T1190) and arbitrary local file reads (T1005).

Confidence: HIGH · MITRE ATT&CK Enterprise v18.1

NVD 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.

Deeper analysisAI

CVE-2026-29059 is an unauthenticated path traversal vulnerability (CWE-22) affecting Windmill, an open-source developer platform for internal code execution including APIs, background jobs, workflows, and UIs. The flaw exists in versions prior to 1.603.3 within the get_log_file endpoint (/api/w/{workspace}/jobs_u/get_log_file/{filename}), where the filename parameter is directly concatenated into a file path without sanitization, enabling traversal using ../ sequences to access files outside the intended directory.

Any unauthenticated attacker with network access can exploit this vulnerability with low complexity and no user interaction required. Successful exploitation allows reading arbitrary files on the server, such as sensitive configuration files or logs. The CVSS v3.1 base score of 7.5 (AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:N/A:N) reflects high confidentiality impact without affecting integrity or availability.

Windmill has patched this issue in version 1.603.3. Security practitioners should upgrade to this version or later. Additional details are available in the release notes at https://github.com/windmill-labs/windmill/releases/tag/v1.603.3 and the GitHub security advisory at https://github.com/windmill-labs/windmill/security/advisories/GHSA-24fr-44f8-fqwg. A related repository at https://github.com/Chocapikk/Windfall may provide further context.