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v5.4.52
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Changelog (https://github.com/symfony/symfony/compare/v5.4.51...v5.4.52)

  • data #64302 Release v5.4.52
  • security #cve-2026-46626 [Runtime] Fix CVE-2024-50340 patch bypass by gating argv on $_SERVER['QUERY_STRING'] (@nicolas-grekas)
  • security #cve-2026-45305 [Yaml] Harden the Parser::cleanup() regexes against catastrophic backtracking (@nicolas-grekas)
  • security #cve-2026-45304 [Yaml] Bound collection-alias resolution in the parser (@nicolas-grekas)
  • security #cve-2026-45133 [Yaml] Bound recursion depth in the parser (@nicolas-grekas)
  • security #cve-2026-45071 [DomCrawler] Fix XXE in addXmlContent() by not enabling validateOnParse (@alexandre-daubois)
  • security #cve-2026-45068 [Mailer] Add end-of-options separator before recipients in SendmailTransport; reject addresses starting with a dash (@alexandre-daubois)
  • security #cve-2026-45063 [Security] Anchor emailAddress regex to RDN boundary in X509Authenticator (@alexandre-daubois)
  • security #cve-2026-45065 [Routing] Fix regex alternation anchoring in UrlGenerator requirement validation (@alexandre-daubois)
  • security #cve-2026-45067 [Mime] Reject email addresses containing line breaks in Address (@alexandre-daubois)
  • security #cve-2026-45073 [Cache] Validate the prefix given to AbstractAdapter::clear() (@nicolas-grekas)
  • security #cve-2026-45077 [MonologBridge] Bind server:log to localhost by default (@nicolas-grekas)