CVE-2026-88132: Azure Key Vault Information Disclosure Vulnerability

Overview

Severity
Medium (CVSS 5.9)
CVSS Vector
CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:H/I:N/A:N/E:U/RL:O/RC:C
Category
Information Disclosure
Exploit Status
Not Exploited
Exploitation Likelihood
Less Likely
Patch Tuesday
2026-Oct
Released
2026-10-13

Description

Origin validation error in Azure Key Vault allows an unauthorized attacker to disclose information over a network.

FAQ

According to the CVSS metric, the attack complexity is high (AC:H). What does that mean for this vulnerability? Exploiting this vulnerability would require an attacker modify the response to take the desired action. An attacker would also have to rely on compromising the principal consuming the SDK, which is beyond attacker's control. What type of information could be disclosed by this vulnerability? Exploiting this vulnerability could allow the disclosure of credentials.

Affected Products (5)

Azure

  • Azure Key Vault Client SDK

Microsoft Office

  • azure-keyvault-keys
  • azure-keyvault-certificates
  • azure-keyvault-secrets
  • azure-keyvault-administration

Security Updates (4)

Acknowledgments

Adam Kistler

Revision History

  • 2026-10-13: Information published.