Search engine darling Google Inc. has patched a hole in its search engine the could have allowed malicious hackers to modify the content of the Google search results page or silently modify search results, but a new hole may have already appeared. The vulnerability concerns the Google Custom WebSearch service, which allows third-party Web portals and other Web sites to use Google"s servers to search content on their Web site. A flaw in Google"s Web servers allowed malicious hackers to insert javascript instead of links to image files, allowing them to alter the appearance of the Google search results page or steal search data. After being alerted to the hole, Google fixed the vulnerability, said Nathan Tyler, a Google spokesman.