Symfony 6.0.10 has just been released.
Here is the list of the most important changes since 6.0.9:

bug #46779 [String] Add an invariable word in french (@lemonlab)
bug #46765 [Serializer] Fix denormalization union types with constructor (@Gwemox)
bug #46769 [HttpKernel] Fix a PHP 8.1 deprecation notice in HttpCache (@mpdude)
bug #46760 Fix double authentication via RememberMe resulting in wrong RememberMe cookie being set in client (@heiglandreas)
bug #46735 [Messenger] Do not log the message object itself (@ajardin)
bug #46748 [Security] Fix legacy impersonation system (@dunglas)
bug #46747 Fix global state pollution between tests run with ApplicationTester (@Seldaek)
bug #46730 [Intl] Fix the IntlDateFormatter::formatObject signature (@damienalexandre)
bug #46668 [FrameworkBundle] Lower JsonSerializableNormalizer priority (@aprat84)
bug #46711 [PhpUnitBridge] Exclude from baseline generation deprecations triggered in legacy test (@mondrake)
bug #46678 [HttpFoundation] Update „[Session] Overwrite invalid session id“ to only validate when files session storage is used (@alexpott)
bug #45861 [Serializer] Try all possible denormalization route with union types when ALLOW_EXTRA_ATTRIBUTES=false (@T-bond)
bug #46676 [DoctrineBridge] Extend type guessing on enum fields (@Gigino Chianese)
bug #46699 [Cache] Respect $save option in all adapters (@jrjohnson)
bug #46697 [HttpKernel] Disable session tracking while collecting profiler data (@nicolas-grekas)
bug #46704 Allow passing null in twig_is_selected_choice (@raziel057)
bug #46684 [MonologBridge] Fixed support of elasticsearch 7.+ in ElasticsearchLogstashHandler (@lyrixx)
bug #46646 [Messenger] move resetting services at worker stopped into listener (@Thomas Talbot)
bug #46368 [Mailer] Fix for missing sender name in case with usage of the EnvelopeListener (@bobahvas)
bug #46603 [Mailer] Fix Error Handling for OhMySMTP Bridge (@paul-oms)
bug #46545 Fix getting class constraints on debug command (@loic425)
bug #46548 [Mime] Allow url as a path in the DataPart::fromPath (@wkania)
bug #46576 Fix choice filter error when loading mix of grouped and non-grouped choices (@BreyndotEchse)
bug #46594 [FrameworkBundle] Fix XML cache config (@HeahDude)
bug #46610 [Messenger] use the outermost wrapping DBAL connection (@xabbuh)
bug #46595 [Console] Escape in command name & description from getDefaultName() (@ogizanagi)
bug #46608 [Console] Fix deprecation when description is null (@HypeMC)
bug #46574 [Console] Escape in command name & description from PHP (getDefault* methods) (@ogizanagi)
bug #46577 [Serializer] Fix ignore attribute in Xml files (@alamirault)
bug #46565 [WebProfilerBundle] Fix dark theme selected line highlight color & reuse css vars (@ogizanagi)
bug #46525 [Serializer] Get attributeContext after converting name (@zenas1210)
bug #46535 [Mime] Check that the path is a file in the DataPart::fromPath (@wkania)
bug #46543 [Cache] do not pass null to strlen() (@xabbuh)
bug #46515 [PropertyInfo] Fix extracting int range type (@norkunas)
bug #46478 [Contracts] remove static cache from ServiceSubscriberTrait (@kbond)

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to detect the code you will need to change in your project and
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