HTML Rendering issues with Mailable Notifications

[karpadiem]

Laravel Version

11.44.3,11.44.4

PHP Version

8.4.5

Database Driver & Version

No response

Description

I thought this might be a duplicate of #55528, however I have reduced my email notification down to a very simple mailable like so:

 public function toMail(object $notifiable): MailMessage
    {

        $url = url('/invite/'.$this->invite->id);
        return (new MailMessage)
            ->line('A new badge was created for you!')
            ->action('Click Here to Claim it!', $url);

    }

In both 11.44.3 and 11.44.4, the html render seems to break and looks like this:

Reverting back to 11.44.2 fixes the email to look like this:

Steps To Reproduce

Create a simple mailable notification in 11.44.3 or 11.44.4

[tormjens]

Can confirm I'm also seeing this in my apps with Laravel 11.44.4. Works again when reverting to 11.44.2.

[crynobone]

11.44.5 has been released to revert the default. However, when dealing with markdown emails generated with generic user input values such as name, addresses etc, it is best to change the template and enable Illuminate\Mail\Markdown::withSecuredEncoding();; as {{ }} doesn't offer any protection against markdown texts

[nguillon]

Hi, issue still occurs with 11.44.5