CVE-2026-32211: Azure MCP Server Information Disclosure Vulnerability

Overview

Severity
Critical (CVSS 9.1)
CVSS Vector
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:N/E:U/RL:O/RC:C
Category
Information Disclosure
Exploit Status
Not Exploited
Patch Tuesday
2026-Apr
Released
2026-04-02

Description

Missing authentication for critical function in Azure MCP Server allows an unauthorized attacker to disclose information over a network.

FAQ

Why are there no links to an update or instructions with steps that must be taken to protect from this vulnerability? This vulnerability has already been fully mitigated by Microsoft. There is no action for users of this service to take. The purpose of this CVE is to provide further transparency. Please see Toward greater transparency: Unveiling Cloud Service CVEs for more information.

Affected Products (1)

Azure

  • Azure Web Apps

Acknowledgments

Sriharsha Pallekonda with <a href="https://www.microsoft.com/">Microsoft</a>, <a href="https://www.linkedin.com/in/vamsi-nukavarapu/">Vamsi Nukavarapu</a> with <a href="https://www.microsoft.com/">Microsoft</a>

Revision History

  • 2026-04-02: Information published.