A flaw was found in WildFly Elytron. Password hashing and verification normalize input with Unicode NFKC, which can collapse fullwidth characters to ASCII equivalents. A remote attacker can more easily guess affected passwords by using an ASCII-only dictionary against accounts whose passwords were intended to include those non-ASCII characters, leading to unauthorized access.
https://euvd.enisa.europa.eu/vulnerability/EUVD-2026-63478
https://bugzilla.redhat.com/show_bug.cgi?id=2514568