CVE-2026-20719

CVE-2026-20719 affects Mattermost server/components that render external SVGs in link embeds across Mattermost 10.11.x–11.4.x (including 11.2.x, 11.3.x, 11.4.x). The root cause is failure to prevent rendering of external SVGs in embeds, enabling unauthenticated users to crash the web/desktop apps...