Microsoft Power Apps Flaw: Critical Remote Attack Vector Exposed

The National Vulnerability Database (NVD) has flagged a critical security flaw, CVE-2026-26149, impacting Microsoft Power Apps. This vulnerability stems from an improper neutralization of escape, meta, or control sequences, a common weakness that attackers can exploit to bypass security features. The NVD assigns this flaw a CVSS score of 9, classifying it as critical.

While specific affected products weren’t detailed by the NVD, the nature of the vulnerability—allowing an authorized attacker to exploit it over a network—suggests a significant risk. The Common Weakness Enumeration (CWE) associated with this issue is CWE-150, which broadly covers the improper validation of control characters. This means that crafted inputs could trick the application into executing unintended commands or revealing sensitive information.

This discovery underscores the ongoing need for vigilant security practices, especially within low-code/no-code platforms like Power Apps, which are increasingly used to build business-critical applications. Attackers could leverage this vulnerability to gain unauthorized access or escalate privileges within an affected environment.