GHSA-mcx4-f5f5-4859 Prevent cache poisoning via a Response Content-Type header in Symfony

• Packagist symfony/http-foundation: >= 4.4.0, < 4.4.7 → fixed in 4.4.7 • Packagist symfony/http-foundation: >= 5.0.0, < 5.0.7 → fixed in 5.0.7 • Packagist symfony/symfony: >= 4.4.0, < 4.4.7 → fixed in 4.4.7 • Packagist symfony/symfony: >= 5.0.0, < 5.0.7 → fixed in 5.0.7

Description ----------- When a `Response` does not contain a `Content-Type` header, Symfony falls back to the format defined in the `Accept` header of the request, leading to a possible mismatch between the response's content and `Content-Type` header. When the response is cached, this can lead to a corrupted cache where the cached format is not the right one. Resolution ---------- Symfony does not use the `Accept` header anymore to guess the `Content-Type`. The patch for this issue is available here for the 4.4 branch. Credits ------- I would like to thank Xavier Lacot from JoliCode for reporting & Yonel Ceruto and Tobias Schultze for fixing the issue.