CVE-2026-31981 HTML injection in Diagram tab and Graph view in Guardian/CMC before 26.2.0

A Stored HTML Injection vulnerability was discovered in the Diagram tab and Graph view due to a shared input validation function being insufficiently restrictive. An authenticated user with administrative privileges can inject malicious HTML tags into N2OS configuration data through multiple inpu...

CVE-2026-31981

A stored HTML injection vulnerability affects the Diagram tab and Graph view of Guardian/CMC (N2OS) prior to 26.2.0. An authenticated administrator can inject HTML into configuration data via multiple input vectors; when viewed by others, the HTML may render and enable phishing or open redirects....

HTML injection in Diagram tab and Graph view in Guardian/CMC before 26.2.0

Summary A Stored HTML Injection vulnerability was discovered in the Diagram tab and Graph view due to a shared input validation function being insufficiently restrictive. Impact An authenticated user with administrative privileges can inject malicious HTML tags into N2OS configuration data throug...