Symfony 6.0.3 has just been released.
Here is the list of the most important changes since 6.0.2:

bug #45193 [FrameworkBundle] Fix missing arguments when a serialization default context is bound (@ArnoudThibaut)
bug #44997 [Runtime] Fix –env and –no-debug with dotenv_overload (@fancyweb)
bug #45188 [Dotenv] Fix bootEnv() override with .env.local.php when the env key already exists (@fancyweb)
bug #45095 [Finder] Fix finding VCS re-included files in excluded directory (@julienfalque)
bug #44987 [DoctrineBridge] Fix automapping (@mbabker)
bug #44860 [Validator] Fix Choice constraint with associative choices array (@derrabus)
bug #44939 [Form] UrlType should not add protocol to emails (@GromNaN)
bug #43149 Silence warnings during tty detection (@neclimdul)
bug #45154 [Serializer] Fix AbstractObjectNormalizer not considering pseudo type false (@Thomas Nunninger)
bug #45185 [Notifier] Fix encoding of messages with FreeMobileTransport (@94noni)
bug #45181 [Console] Fix PHP 8.1 deprecation in ChoiceQuestion (@BrokenSourceCode)
bug #44634 [HttpKernel] Fix compatibility with php bridge and already started php sessions (@alexander-schranz)
bug #45174 [Notifier] Use the UTF-8 encoding in smsapi-notifier (@marphi)
bug #45140 [Yaml] Making the parser stateless (@mamazu)
bug #45109 [Console] fix restoring stty mode on CTRL+C (@nicolas-grekas)
bug #45103 [Process] Avoid calling fclose on an already closed resource (@Seldaek)
bug #44941 [RateLimiter] Resolve crash on near-round timestamps (@xesxen)
bug #45088 [Console] fix parsing escaped chars in StringInput (@nicolas-grekas)
bug #45096 [Cache] Throw exception if incompatible version of psr/simple-cache is used (@colinodell)
bug #45067 [RateLimiter] Implicit conversion fix (@brian978)
bug #45063 [DependencyInjection] remove arbitratry limitation to exclude inline services from bindings (@nicolas-grekas)
bug #44986 [DependencyInjection] copy synthetic status when resolving child definitions (@kbond)
bug #45073 [HttpClient] Fix Failed to open stream: Too many open files (@adrienfr)
bug #45053 [Console] use STDOUT/ERR in ConsoleOutput to save opening too many file descriptors (@nicolas-grekas)
bug #45029 [Cache] Set mtime of cache files 1 year into future if they do not expire (@Blacksmoke16)
bug #45012 [DoctrineBridge] Fix invalid guess with enumType (@jderusse)
bug #45015 [HttpClient] fix resetting DNS/etc when calling CurlHttpClient::reset() (@nicolas-grekas)
bug #45004 [HttpClient] Remove deprecated usage of GuzzleHttpPromisepromise_for (@plozmun)
bug #44998 [FrameworkBundle] Allow default cache pools to be overwritten by user (@Seldaek)
bug #44890 [HttpClient] Remove deprecated usage of GuzzleHttpPromisequeue (@GrahamCampbell)
bug #45002 [PropertyAccess] Fix handling of uninitialized property of anonymous class (@filiplikavcan)
bug #44979 [DependencyInjection] Add iterable to possible binding type (@vladimir.panivko)
bug #44908 [Serializer] Fix AbstractObjectNormalizer TypeError on denormalization (@JustDylan23)
bug #44976 [FrameworkBundle] Avoid calling rtrim(null, ‚/‘) in AssetsInstallCommand (@pavol-tk, @GromNaN)
bug #44879 [DependencyInjection] Ignore argument type check in CheckTypeDeclarationsPass if it’s a Definition with a factory (@fancyweb)
bug #44920 Use correct tag for ExpoTransportFactory service (@jschaedl)
bug #44931 Allow a zero time-limit for messenger:consume (@fritzmg)
bug #44932 [DependencyInjection] Fix nested env var with resolve processor (@Laurent Moreau)
bug #44912 [Console] Allow OutputFormatter::escape() to be used for escaping URLs used in <href> (@Seldaek)
bug #44877 [Validator] Error using CssColor with doctrine annotations (@sormes)
bug #44878 [HttpClient] Turn negative timeout to a very long timeout (@fancyweb)
bug #44854 [Validator] throw when Constraint::_construct() has not been called (@nicolas-grekas)
bug #44857 [Translation] [LocoProvider] Fix use of asset ids (@danut007ro)

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to detect the code you will need to change in your project and
read our upgrade
documentation to learn more.

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