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Symfony Blog

All about Symfony releases, new Symfony features, and other important announcements

Symfony 8.1 improves Messenger with batch fetching, AMQP priorities, smarter retries, and configurable resets.
May 22, 2026 #Living on the edge ❤️ 7 👍 8 🚀 5 🎉 4
Claude Mythos Preview, Anthropic's unreleased model, audited Symfony and Twig code and reported 19 vulnerabilities. All of them turned out to be real.
May 21, 2026 #Symfony 👀 2 ❤️ 32 👍 11 🚀 13 🎉 3
Email Header Injection via Non-Token Characters in Mime Parameter Names
Johannes introduces Symfony Mate, an MCP server that exposes a curated, deterministic view of your running Symfony application (container, services, profiler, logs) to any MCP-aware client
May 20, 2026 #Conferences 🚀 1
Mailtrap Mailer Webhook Parser Never Verifies the X-Mt-Signature HMAC: Unauthenticated Webhook Event Injection
JsonPath Evaluates Attacker-Controlled Regular Expressions in match()/search() Without Limits: ReDoS
SymfonyRuntime CVE-2024-50340 Patch Bypass: Web Requests Can Still Set APP_ENV/APP_DEBUG via parse_str/SAPI Argv Mismatch
Twilio Notifier Webhook Parser Never Verifies the X-Twilio-Signature HMAC: Unauthenticated Webhook Event Injection
Mailjet Mailer and LOX24 Notifier Webhook Parsers Never Verify the Configured Secret: Unauthenticated Webhook Event Injection
SQL Injection in PdoAdapter::doClear() via Unsanitized $prefix