This vulnerability in Microsoft Graph involves the exposure of sensitive information to unauthorized actors by an authorized attacker over a network. It is identified as CWE-200, which pertains to information exposure. The CVSS vector indicates the attack requires network access with low complexity, privileges required are low, no user interaction is needed, and the confidentiality impact is high while integrity and availability are unaffected. Microsoft has released an official fix for this vulnerability as per their advisory.

An authorized attacker can disclose sensitive information over a network, potentially leading to data leakage. The confidentiality impact is high, but there is no impact on integrity or availability. This could result in unauthorized access to sensitive data within Microsoft Graph environments.

An official fix is available from Microsoft. Users and administrators should apply the patch provided in the Microsoft security update guide for CVE-2026-49159 to remediate this vulnerability. No additional mitigation steps are indicated by the vendor advisory.