CVE-2020-5255

CVE-2020-5255

In Symfony before version 4.4, when a `Response` does not contain a `Content-Type` header, affected versions of Symfony can fallback 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 prevent the use of the website by other users. This has been patched in version 4.4.

Source: CVE-2020-5255

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