Symfony 4.4.45 has just been released.
Here is the list of the most important changes since 4.4.44:

bug #47358 Fix broken request stack state if throwable is thrown. (@Warxcell)
bug #47304 [Serializer] Fix caching context-aware encoders/decoders in ChainEncoder/ChainDecoder (@Guite)
bug #47329 Email image parts: regex for single closing quote (@rr-it)
bug #47200 [Form] ignore missing keys when mapping DateTime objects to uninitialized arrays (@xabbuh)
bug #47189 [Validator] Add additional hint when egulias/email-validator needs to be installed (@mpdude)
bug #47195 [FrameworkBundle] fix writes to static $kernel property (@xabbuh)
bug #47175 [DowCrawler] Fix locale-sensitivity of whitespace normalization (@nicolas-grekas)
bug #47171 [TwigBridge] suggest to install the Twig bundle when the required component is already installed (@xabbuh)
bug #47161 [Mailer] Fix logic (@fabpot)
bug #47157 [Messenger] Fix Doctrine transport on MySQL (@nicolas-grekas)
bug #46190 [Translation] Fix translator overlapse (@Xavier RENAUDIN)
bug #47142 [Mailer] Fix error message in case of an STMP error (@fabpot)
bug #47145 [HttpClient] Fix shared connections not being freed on PHP < 8 (@nicolas-grekas)
bug #47143 [HttpClient] Fix memory leak when using StreamWrapper (@nicolas-grekas)
bug #47130 [HttpFoundation] Fix invalid ID not regenerated with native PHP file sessions (@BrokenSourceCode)

Want to upgrade to this new release? Because Symfony protects
backwards-compatibility very closely, this should be quite easy. Use
SymfonyInsight upgrade reports
to detect the code you will need to change in your project and
read our upgrade
documentation to learn more.

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