Stored XSS Vulnerability in ntfy
In May 2026, security researchers at Astra identified a Stored Cross-Site Scripting (XSS) Vulnerability in the SVG attachment preview function of nfty, affecting versions up to 2.22.0. Stored Cross-Site Scripting (XSS) is a vulnerability that allows attackers to inject and permanently execute malicious scripts within a web application. If exploited, the threat actor could perform actions on behalf of the victim.