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Symfony Blog

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

Sandbox `__toString()` policy bypass via `Traversable` in `join`/`replace` filters and via the `in`/`not in` operators
Sandbox state regression in deprecated internal wrappers in `src/Resources/core.php`
May 27, 2026 #Releases #Twig 👍 1
Join Sean Mackay at SymfonyDay Montreal as he breaks down the key Symfony features (Doctrine, Messenger, Events) that transformed Pimcore into a robust, update-friendly platform
May 27, 2026 #Conferences
May 27, 2026 #Releases
May 27, 2026 #Releases
IpUtils::PRIVATE_SUBNETS Omits IPv6 Transition Forms (6to4, NAT64, Teredo, IPv4-compatible): SSRF Bypass in NoPrivateNetworkHttpClient
HtmlSanitizer UrlAttributeSanitizer Misses URL Attributes on object, applet, iframe, img and the URL Inside meta http-equiv="refresh" content
Mailomat Mailer Webhook Parser Reads the HMAC Algorithm from the Request: Signature Algorithm Downgrade
UrlGenerator Dot-Segment Encoding Skips Every Other Chained ../ or ./: Generated URL Collapses Off-Route Under RFC 3986 Normalization
May 27, 2026 #Security Advisories #Symfony ❤️ 1