2.0.48

Released: March 2, 2026

engine

• [engine] [bug] Fixed a critical issue in Engine where connections created in
  conjunction with the DialectEvents.do_connect() event listeners
  would receive shared, mutable collections for the connection arguments,
  leading to a variety of potential issues including unlimited growth of the
  argument list as well as elements within the parameter dictionary being
  shared among concurrent connection calls. In particular this could impact
  do_connect routines making use of complex mutable authentication
  structures.

  References: #13144