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The results of an attack on a vulnerable XML library can be fairly
dramatic. With just a few hundred Bytes of XML data an attacker
can occupy several Gigabytes of memory within seconds. An attacker
can also keep CPUs busy for a long time with a small to medium size
request. Under some circumstances it is even possible to access local
files on your server, to circumvent a firewall, or to abuse services
to rebound attacks to third parties. This library allows for XML to
be parsed in a manner that avoids these pitfalls.
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