What’s Vulnerable › Vulnerabilities

CVE-2016-4590

• Severity: medium (CVSS 5.4 v3.0)
• Exploited in the wild: not listed in CISA KEV
• EPSS: 1.5% probability of exploitation in the next 30 days
• Public exploit or detection template: none known
• Published: 2016-07-22 · updated 2026-06-17
• Weakness: CWE-20

Description

WebKit in Apple iOS before 9.3.3 and Safari before 9.1.2 mishandles about: URLs, which allows remote attackers to bypass the Same Origin Policy via a crafted web site.

Affected products

• Apple Safari: through 9.1.1
• Apple Webkit: all versions

References

• http://lists.apple.com/archives/security-announce/2016/Jul/msg00001.html
• http://lists.apple.com/archives/security-announce/2016/Jul/msg00004.html
• http://packetstormsecurity.com/files/138502/WebKitGTK-SOP-Bypass-Information-Disclosure.html
• http://www.securityfocus.com/archive/1/539295/100/0/threaded
• http://www.securityfocus.com/bid/91835
• http://www.securitytracker.com/id/1036343
• https://support.apple.com/HT206900
• https://support.apple.com/HT206902
• http://lists.apple.com/archives/security-announce/2016/Jul/msg00001.html
• http://lists.apple.com/archives/security-announce/2016/Jul/msg00004.html
• http://packetstormsecurity.com/files/138502/WebKitGTK-SOP-Bypass-Information-Disclosure.html
• http://www.securityfocus.com/archive/1/539295/100/0/threaded

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