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Symfony releases maintenance update 6.4.47
Symfony Releases, September 29, 2026 — Symfony released version 6.4.47 on 29 September. The update fixes escaping in generated PHP code and tightens Redis namespace cleanup. Serializer cache keys and YAML parsing also receive fixes, alongside HTTP client and Messenger patches. ErrorHandler now reads the fatal-error backtrace supplied by PHP 8.5.
Symfony published version 6.4.47 on 29 September. Fabien Potencier signed the release. The verified commit is 9e1e0c5, tagged with GPG key ID B5690EEEBB952194.
The update corrects several DependencyInjection cases. Symfony now tracks reused environment placeholders after an extension removes them and escapes identifiers in generated PHP. Shared circular wither services expose their service ID, and tag movement between decorators is fixed. Redis namespace cleanup now escapes glob characters, and DoctrineBridge extracts UUID and ULID types more accurately, including collections indexed by custom types.
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