CVE-2013-1801
The httparty gem 0.9.0 and earlier for Ruby does not properly restrict casts of string values, which might allow remote attackers to conduct object-injection attacks and execute arbitrary code, or cause a denial of service (memory and CPU consumption) by leveraging Action Pack support for YAML type conversion, a similar vulnerability to CVE-2013-0156.
Date published : 2013-04-09
http://www.securityfocus.com/bid/58260
https://github.com/jnunemaker/httparty/commit/53a812426dd32108d6cba4272b493aa03bc8c031