BIT-PGBOUNCER-2026-107350 Authentication bypass via second StartupMessage during SCRAM authentication in PgBouncer

Improper authentication in PgBouncer 1.17.0 through 1.26.0 allows a remote attacker who knows the password of a user listed in authfile to log in as any other user that authenticates using SCRAM, including PgBouncer admin users and backend superusers. A second StartupMessage sent during SCRAM...