{"id":"CVE-2018-4277","url":"https://www.cyber-defence.io/tools/cve/CVE-2018-4277","generatedAt":"2026-10-29T03:57:41.776Z","title":"In iOS before 11.4.1, watchOS before 4.3.2, tvOS before 11.4.1, Safari before 11.1.1, macOS High Sierra before 10.13.6, a spoofing issue existed in the handling of URLs.","description":"In iOS before 11.4.1, watchOS before 4.3.2, tvOS before 11.4.1, Safari before 11.1.1, macOS High Sierra before 10.13.6, a spoofing issue existed in the handling of URLs. This issue was addressed with improved input validation.","published":"2019-01-11T18:29:03.000Z","lastModified":"2026-06-17T01:58:43.000Z","status":"Modified","sourceIdentifier":"product-security@apple.com","cvss":{"version":"3.0","score":7.5,"severity":"HIGH","vector":"CVSS:3.0/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:H/A:N"},"cwe":["CWE-20"],"affected":["apple/safari","apple/iphone os","apple/mac os x","apple/tvos","apple/watchos"],"epss":{"score":0.01867,"percentile":0.79229,"date":"2026-10-28","history":[]},"kev":{"listed":false},"exploits":{"count":0,"verified":false,"firstPublished":null,"source":"Exploit-DB (https://gitlab.com/exploit-database/exploitdb)","entries":[]},"verdict":{"level":"high","text":"High impact if exploited, but EPSS currently rates exploitation as unlikely (1.87%). Schedule it in the normal patch cycle and watch for a rise in EPSS or a public exploit."},"changes":[],"references":[{"url":"http://www.securitytracker.com/id/1041232","tags":["Third Party Advisory","VDB Entry"],"source":"product-security@apple.com"},{"url":"https://support.apple.com/HT208854","source":"product-security@apple.com"},{"url":"https://support.apple.com/HT208935","source":"product-security@apple.com"},{"url":"https://support.apple.com/HT208936","source":"product-security@apple.com"},{"url":"https://support.apple.com/HT208937","tags":["Vendor Advisory"],"source":"product-security@apple.com"},{"url":"https://support.apple.com/HT208938","source":"product-security@apple.com"},{"url":"http://www.securitytracker.com/id/1041232","tags":["Third Party Advisory","VDB Entry"],"source":"af854a3a-2127-422b-91ae-364da2661108"},{"url":"https://support.apple.com/HT208854","source":"af854a3a-2127-422b-91ae-364da2661108"},{"url":"https://support.apple.com/HT208935","source":"af854a3a-2127-422b-91ae-364da2661108"},{"url":"https://support.apple.com/HT208936","source":"af854a3a-2127-422b-91ae-364da2661108"},{"url":"https://support.apple.com/HT208937","tags":["Vendor Advisory"],"source":"af854a3a-2127-422b-91ae-364da2661108"},{"url":"https://support.apple.com/HT208938","source":"af854a3a-2127-422b-91ae-364da2661108"}],"sources":{"nvd":"https://nvd.nist.gov/vuln/detail/CVE-2018-4277","epss":"https://www.first.org/epss/","kev":"https://www.cisa.gov/known-exploited-vulnerabilities-catalog","exploitdb":"https://www.exploit-db.com/"},"licence":"CC BY 4.0 — link back to the CVE Explorer if you publish the results; upstream data remains subject to its own terms."}