Adobe ColdFusion 8.0, 8.0.1, 9.0, and 9.0.1 computes hash values for form parameters without restricting the ability to trigger hash collisions predictably, which allows remote attackers to cause a denial of service (CPU consumption) by sending many crafted parameters.
https://exchange.xforce.ibmcloud.com/vulnerabilities/73955
http://www.securitytracker.com/id?1026830
http://www.adobe.com/support/security/bulletins/apsb12-06.html
http://secunia.com/advisories/48393
http://helpx.adobe.com/coldfusion/kb/coldfusion-security-hotfix.html