The from_yaml method in serializers.py in Django Tastypie before 0.9.10 does not properly deserialize YAML data, which allows remote attackers to execute arbitrary Python code via vectors related to the yaml.load method.
www.openwall.com/lists/oss-security/2011/11/02/1
www.openwall.com/lists/oss-security/2011/11/02/7
github.com/toastdriven/django-tastypie/commit/e8af315211b07c8f48f32a063233cc3f76dd5bc2
groups.google.com/forum/#%21topic/django-tastypie/i2aNGDHTUBI
www.djangoproject.com/weblog/2011/nov/01/piston-and-tastypie-security-releases/