CVE-2013-6401
Jansson, possibly 2.4 and earlier, does not restrict the ability to trigger hash collisions predictably, which allows context-dependent attackers to cause a denial of service (CPU consumption) via a crafted JSON document.
Date published : 2014-03-20
https://bugzilla.redhat.com/show_bug.cgi?id=1035538
https://github.com/akheron/jansson/commit/8f80c2d83808150724d31793e6ade92749b1faa4