CVE-2026-72541
Received Received - Intake

Missing Authorization in Windmill Allows Schema Overwrite

Publication date: 2026-08-11

Last updated on: 2026-08-11

Assigner: 309f9ea4-e3e9-4c6c-b79d-e8eb01244f2c

Description
A missing authorization vulnerability in Windmill Labs Windmill through 1.783.0 allows any authenticated workspace member to overwrite any resource type schema via the update_resource_type endpoint. The endpoint omits the administrator permission check that the corresponding delete_resource_type endpoint enforces. An attacker with workspace member privileges can corrupt resource type definitions, breaking workflows that depend on them.

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Meta Information

Published
2026-08-11
Last Modified
2026-08-11
Generated
2026-08-11
AI Q&A
2026-08-11
EPSS Evaluated
N/A
NVD
CVE-2026-72541
EUVD
EUVD-2026-56011

Affected Vendors & Products

Showing 1 associated CPE
Vendor Product Version / Range
windmill_labs windmill 1.783.0

Helpful Resources

Exploitability

CWE
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KEV
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CWE ID Description
CWE-306 The product does not perform any authentication for functionality that requires a provable user identity or consumes a significant amount of resources.

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Executive Summary

This is a missing authorization vulnerability in Windmill Labs Windmill through version 1.783.0. It allows any authenticated workspace member to overwrite any resource type schema via the update_resource_type endpoint. The vulnerability exists because this endpoint lacks the administrator permission check that the delete_resource_type endpoint enforces.

Detection Guidance

To detect this vulnerability, monitor for unauthorized modifications to resource type schemas in Windmill. Check logs for requests to the update_resource_type endpoint by non-admin users. Look for unexpected changes in workflows or errors related to corrupted resource types.

Impact Analysis

An attacker with workspace member privileges could corrupt resource type definitions. This would break workflows that depend on those resource types, potentially disrupting operations that rely on Windmill for automation or integration tasks.

Compliance Impact

The vulnerability allows unauthorized modification of resource schemas by any workspace member, which could lead to unauthorized changes in data handling workflows. This may violate compliance requirements for data integrity and access controls in standards like GDPR and HIPAA, as it undermines secure data processing and auditability.

Mitigation Strategies

Update Windmill to a version that includes the missing authorization check in the update_resource_type endpoint. If immediate update is not possible, restrict workspace member privileges to prevent unauthorized schema modifications.

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