CVE 2010-1774
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, accesses out-of-bounds memory during processing of HTML tables, which allows remote attackers to execute arbitrary code or cause a denial of service (application crash) via a crafted HTML document.
See the 
CVE page on Mitre.org
for more details.
