The parsestring function in cjson.c in the cJSON library mishandles UTF8/16 strings, which allows remote attackers to cause a denial of service (crash) or execute arbitrary code via a non-hex character in a JSON string, which triggers a heap-based buffer overflow.
Google Chrome before 48.0.2564.116 allows remote attackers to bypass the Blink Same Origin Policy and a sandbox protection mechanism via unspecified vectors.