Escalation in the Yemen conflict has intensified cross-border threats, with Houthi forces seizing Red Sea coastal territory including Mokha port in September 2026 and responding to Saudi-backed Yemeni government counteroffensives with repeated missile and drone strikes on Saudi targets. These include deadly attacks on Riyadh’s King Khalid International Airport in early October that killed at least 13 and injured hundreds, plus strikes on oil infrastructure and military sites in provinces such as Jizan and Asir. Saudi Arabia has conducted airstrikes in support of Yemeni forces, invoked defense arrangements with Turkey and Pakistan, and maintained air defenses, while no confirmed Houthi ground incursions into Saudi territory have occurred. Upcoming developments include the pace of the Yemeni counteroffensive, Saudi interception capacity, and any diplomatic de-escalation efforts that could shape the risk of direct territorial entry.