CVE-2026-112262: RisingWave before 3.1.0 Missing Authorization via posix_fs and fs Connectors

RisingWave before 3.1.0 contains a missing authorization vulnerability that allows low-privileged SQL users to read and write arbitrary server files by creating posixfs sources and fs sinks. Attackers holding schema CREATE privilege can set posixfs.root or fs.path to any directory to read credentials and keys or write files as root.