CVE 2010-1416
WebKit in Apple Safari before 5.0 on Mac OS X 10.5 through 10.6 and Windows, and before 4.1 on Mac OS X 10.4, does not properly restrict the reading of a canvas that contains an SVG image pattern from a different web site, which allows remote attackers to read images from other sites via a crafted canvas, related to a "cross-site image capture issue."
See the 
CVE page on Mitre.org
for more details.
