Versions 0.8.3 and earlier of
send are affected by a directory traversal vulnerability. When relying on the root option to restrict file access it may be possible for an application consumer to escape out of the restricted directory and access files in a similarly named directory.
static(_dirname + '/public') would allow access to
_dirname + '/public-restricted'.
Update to version 0.8.4 or later.
publishedAdvisory publishedSep 12th, 2014
reportedInitial report by Ilya KantorOct 17th, 2015