CVE-2023-29401

The filename parameter of the Context.FileAttachment function is not
properly sanitized. A maliciously crafted filename can cause the
Content-Disposition header to be sent with an unexpected filename value or
otherwise modify the Content-Disposition header. For example, a filename of
“setup.bat";x=.txt” will be sent as a file named “setup.bat”. If the
FileAttachment function is called with names provided by an untrusted
source, this may permit an attacker to cause a file to be served with a
name different than provided. Maliciously crafted attachment file name can
modify the Content-Disposition header.