Symfony 3.4.20 released

Symfony 3.4.20 has just been released. Here is a list of the most important changes:

• security #cve-2018-19790 [SecurityHttp] detect bad redirect targets using backslashes (@xabbuh)
• security #cve-2018-19789 [Form] Filter file uploads out of regular form types (@nicolas-grekas)
• bug #29436 [Cache] Fixed Memcached adapter doClear()to call flush() (@raitocz)
• bug #29441 [Routing] ignore trailing slash for non-GET requests (@nicolas-grekas)
• bug #29432 [DI] dont inline when lazy edges are found (@nicolas-grekas)
• bug #29413 [Serializer] fixed DateTimeNormalizer to maintain microseconds when a different timezone required (@rvitaliy)
• bug #29424 [Routing] fix taking verb into account when redirecting (@nicolas-grekas)
• bug #29414 [DI] Fix dumping expressions accessing single-use private services (@chalasr)
• bug #29375 [Validator] Allow ConstraintViolation::toString() to expose codes that are not null or emtpy strings (@phansys)
• bug #29376 [EventDispatcher] Fix eventListener wrapper loop in TraceableEventDispatcher (@jderusse)
• bug #29343 [Form] Handle all case variants of "nan" when parsing a number (@mwhudson, @xabbuh)
• bug #29355 [PropertyAccess] calculate cache keys for property setters depending on the value (@xabbuh)
• bug #29369 [DI] fix combinatorial explosion when analyzing the service graph (@nicolas-grekas)
• bug #29349 [Debug] workaround opcache bug mutating "$this" !?! (@nicolas-grekas)

Want to upgrade to this new release? Fortunately, because Symfony protects backwards-compatibility very closely, this should be quite easy. Read our upgrade documentation to learn more.

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