The two CVEs against Varnish were both utterly bogus "trophy-hunter" CVEs in my opinion. (But don't take my word for it, judge for yourself.)

ok

CVE-2013-4484: Varnish before 3.0.5 allows remote attackers to cause a denial of service (child-process crash and temporary caching outage) via a GET request with trailing whitespace characters and no URI.

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