Google Chrome before 1.0.154.46 does not properly restrict access from web pages to the (1) Set-Cookie and (2) Set-Cookie2 HTTP response headers, which allows remote attackers to obtain sensitive information from cookies via XMLHttpRequest calls and other web script.
https://exchange.xforce.ibmcloud.com/vulnerabilities/48554
http://src.chromium.org/viewvc/chrome?view=rev&revision=8529
http://sites.google.com/a/chromium.org/dev/getting-involved/dev-channel/release-notes