UC Berkeley precautionary PHP shutdown affects campus websites

UC Berkeley took its campus homepage and other campus websites offline October 21, 2026, as a precaution while its host addressed critical PHP vulnerabilities. Official notices warned of inaccessible sites and unavailable web services; already patched Open Berkeley, Berkeley Web Builder and Pantheon DIY sites were unaffected. Full restoration, exploitation and data compromise were not established in the notices. This October precautionary shutdown is distinct from the university's earlier EECS intrusion and recovery.