Speculative execution side-channel attacks like Spectre are a newly discovered security risk for web browsers. A website could use such attacks to steal data or login information from other websites that are open in the browser. To better mitigate these attacks, were excited to announce that Chrome 67 has enabled a security ..
https://security.googleblog.com/2018/07/mitigating-spectre-with-site-isolation.html
Vulnerabilities
Cisco Web Security Appliance Cross-Site Scripting Vulnerability