Constrain classes further in MailPreview controller (#1078)#1079
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This controller should not attempt to load classes with `\` in the name, nor should it attempt to load classes that do not extedn `MailPreview`. Thanks to Volker Dusch and the PHP Ecosystem security team for reporting this. Backport from 5.x
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This controller should not attempt to load classes with
\in the name, nor should it attempt to load classes that do not extednMailPreview.Thanks to Volker Dusch and the PHP Ecosystem security team for reporting this.
Backport from 5.x