Grafana has released versions 5.3.3 and 4.6.5 to address a critical security vulnerability identified as CVE-2018-19039, which affects all installations from versions 4.1.0 to 5.3.2. This vulnerability allows users with Editor or Admin permissions to read any file accessible by the Grafana process. Users are advised to upgrade immediately to prevent unauthorized file access, while Grafana Cloud and Enterprise customers have already received necessary updates. The release, coordinated to accommodate global time zones, underscores the importance of timely security patches. Grafana encourages reporting any security vulnerabilities via their dedicated email and provides a community site for security announcements.