# CVE-2026-40374: Microsoft Power Automate Information Disclosure

Source: https://junglewise.ai/threats/cve-2026-40374-microsoft-power-automate-information-disclosure  
Publisher: Junglewise Threat Intelligence, https://junglewise.ai/threats  
Published: 2026-05-12. Updated: 2026-05-19  
License: CC BY 4.0 with a link back

CVE-2026-40374 · Severity: medium · CVSS 6.5 · Published 2026-05-12

Microsoft Power Automate, a service used to automate workflows between apps and services, contains a vulnerability that could allow an authorized user to access sensitive information they are not permitted to see. An attacker with basic user permissions could exploit this over the network to disclose internal data. This could lead to the exposure of confidential business logic or organizational data, potentially aiding further attacks.

Technologies: [Microsoft Power Automate](https://junglewise.ai/threats/technologies/power-automate). Vendors: [Microsoft](https://junglewise.ai/threats/vendors/microsoft).

## Quick answers

**Is CVE-2026-40374 exploited in the wild?** No. Junglewise Threat Intelligence has no report of CVE-2026-40374 being exploited in the wild.

**How severe is CVE-2026-40374?** Medium severity, with a CVSS score of 6.5, published 12 May 2026.

**Which products and versions are affected?** Microsoft Power Automate.

**Is there a fix for CVE-2026-40374?** No fixed version is recorded yet. Check the vendor's advisory in the references below. If you run it, Junglewise drafts a mitigation that fits your setup and applies it once you approve, with senior security engineers behind it.

**How is CVE-2026-40374 attacked?** It is attacked over the network, in a hosted service.

**Am I affected by CVE-2026-40374?** Check whether you run Microsoft Power Automate or Microsoft Power Automate For Desktop. Junglewise does that check for you around the clock: connect your code, cloud and domains, and it matches new vulnerabilities like this one against what you actually run and tells you when one reaches you.

## Technical details

An information disclosure vulnerability (CWE-200) exists in Microsoft Power Automate. The flaw allows an authenticated attacker with low privileges to disclose sensitive information over a network. According to the CVSS vector, the attack vector is network-based, complexity is low, and no user interaction is required, though it does require 'Low' prior authentication. Successful exploitation results in a 'High' impact on confidentiality, while integrity and availability remain unaffected. Users should refer to the Microsoft Security Response Center for specific patching or mitigation guidance.

## Affected products

- Microsoft Power Automate

## Timeline

- 2026-05-12: disclosed
- 2026-05-12: advisory

## References

- [https://msrc.microsoft.com/update-guide/vulnerability/CVE-2026-40374](https://msrc.microsoft.com/update-guide/vulnerability/CVE-2026-40374)

## Related threats

- [Microsoft Power Automate relative path traversal privilege escalation](https://junglewise.ai/threats/cve-2026-77897-microsoft-power-automate-relative-path-traversal-privilege)
- [Microsoft Power Automate server-side request forgery privilege escalation](https://junglewise.ai/threats/cve-2026-65818-microsoft-power-automate-server-side-request-forgery-privilege)