Symfony 5.4.42 has just been released.
Here is the list of the most important changes since 5.4.41:

bug #57815 [Console][PhpUnitBridge][VarDumper] Fix NO_COLOR empty value handling (@alexandre-daubois)
bug #57828 [Translation] Fix CSV escape char in CsvFileLoader on PHP >= 7.4 (@alexandre-daubois)
bug #57812 [Validator] treat uninitialized properties referenced by property paths as null (@xabbuh)
bug #57816 [DoctrineBridge] fix messenger bus dispatch inside an active transaction (@IndraGunawan)
bug #57799 [ErrorHandler][VarDumper] Remove PHP 8.4 deprecations (@alexandre-daubois)
bug #57802 [PropertyInfo] Fix nullable value returned from extractFromMutator on CollectionType (@benjilebon)
bug #57832 [DependencyInjection] Do not try to load default method name on interface (@lyrixx)
bug #57753 [ErrorHandler] restrict the maximum length of the X-Debug-Exception header (@xabbuh)
bug #57674 [Cache] Improve dbindex DSN parameter parsing (@constantable)
bug #57663 [Cache] use copy() instead of rename() on Windows (@xabbuh)
bug #57617 [PropertyInfo] Handle collection in PhpStan same as PhpDoc (@mtarld)
bug #54057 [Messenger] Passing actual Envelope to WorkerMessageRetriedEvent (@daffoxdev)
bug #57645 [Routing] Discard in-memory cache of routes when writing the file-based cache (@mpdude)
bug #57621 [Mailer] force HTTP 1.1 for Mailgun API requests (@xabbuh)
bug #57616 [String] Revert „Fixed u()->snake(), b()->snake() and s()->snake() methods“ (@nicolas-grekas)
bug #57594 [String] Normalize underscores in snake() (@xabbuh)
bug #57585 [HttpFoundation] Fix MockArraySessionStorage to generate more conform ids (@Seldaek)

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