Executive brief
Azure App Service is a cloud platform used by organizations to host and manage web applications. A critical security flaw in this service allows an unauthorized person to gain elevated administrative permissions over the network. This could lead to full control over hosted applications and potential access to sensitive customer data.
Technical details
A vulnerability classified as improper access control (CWE-284) exists in Azure App Service for Linux. The flaw allows an unauthenticated remote attacker to bypass security restrictions and elevate their privileges within the environment. According to the CVSS vector, the attack can be carried out over the network with low complexity and requires no user interaction. Successful exploitation results in a high impact on confidentiality and integrity, potentially allowing for a full compromise of the service instance. As this is a cloud-hosted service, Microsoft typically manages the deployment of fixes directly.
Affected products
- Microsoft Azure App Service for Linux All versions
Timeline
- 2026-07-24: disclosed: Vulnerability published by Microsoft and NVD.