CVE-2026-45809 OpenSIPS: Denial of Service in watcherinfo XML generation from oversized watcher URI

OpenSIPS is a Session Initiation Protocol SIP server implementation. Versions prior to 3.6.6 and 4.0.0-rc1 contain a denial of service vulnerability in the watcherinfo generation functionality. An attacker can create an oversized watcher entry by sending a SUBSCRIBE Event: presence request with a...