MSRC-CVE-2026-40374 — Microsoft Power Automate Desktop Information Disclosure Vulnerability

Summary

Impact: Information Disclosure. Microsoft rating: Important. Not known to be exploited — Exploitation Less Likely. Customer action: Required.

Details

What type of information could be disclosed by this vulnerability?
This vulnerability could expose values stored in variables that were marked as “Sensitive” within Power Automate Desktop flows. Due to a logging issue, these sensitive variable values may appear in execution logs uploaded to the Power Automate portal and be viewable by users with Owner, Co-Owner, or Runner permissions for the affected desktop flow.

Security updates
2.67 — https://learn.microsoft.com/en-us/power-platform/released-versions/power-automate-desktop

Vulnerabilities 1

Medium 6.5

CVE-2026-40374

Microsoft Power Automate Desktop Information Disclosure Vulnerability

Exposure of sensitive information to an unauthorized actor in Power Automate allows an authorized attacker to disclose information over a network.

Microsoft Power Automate for Desktop

May 12, 2026

Revision history

2026-05-12 #1
Information published.

References

CVE-2026-40374 Microsoft Power Automate Desktop Information Disclosure Vulnerability - HTML
https://msrc.microsoft.com/update-guide/vulnerability/CVE-2026-40374
Microsoft Exploitability Index
https://www.microsoft.com/en-us/msrc/exploitability-index?rtc=1
Microsoft Support Lifecycle
https://support.microsoft.com/lifecycle
Common Vulnerability Scoring System
https://www.first.org/cvss