{"id":"CVE-2018-4218","url":"https://www.cyber-defence.io/tools/cve/CVE-2018-4218","generatedAt":"2026-10-28T23:56:48.771Z","title":"It allows remote attackers to execute arbitrary code or cause a denial of service (memory corruption and application crash) via a crafted web site that triggers an @generatorState use-after-free.","description":"An issue was discovered in certain Apple products. iOS before 11.4 is affected. Safari before 11.1.1 is affected. iCloud before 7.5 on Windows is affected. iTunes before 12.7.5 on Windows is affected. tvOS before 11.4 is affected. watchOS before 4.3.1 is affected. The issue involves the \"WebKit\" component. It allows remote attackers to execute arbitrary code or cause a denial of service (memory corruption and application crash) via a crafted web site that triggers an @generatorState use-after-free.","published":"2018-06-08T18:29:01.000Z","lastModified":"2026-06-17T01:58:36.000Z","status":"Modified","sourceIdentifier":"product-security@apple.com","cvss":{"version":"3.0","score":8.8,"severity":"HIGH","vector":"CVSS:3.0/AV:N/AC:L/PR:N/UI:R/S:U/C:H/I:H/A:H"},"cwe":["CWE-416"],"affected":["apple/safari","apple/iphone os","apple/tvos","apple/watchos","apple/icloud","apple/itunes","canonical/ubuntu linux"],"epss":{"score":0.09055,"percentile":0.95261,"date":"2026-10-27","history":[{"date":"2026-09-21","score":0.11012,"percentile":0.95766},{"date":"2026-09-22","score":0.08964,"percentile":0.95019}]},"kev":{"listed":false},"exploits":{"count":1,"verified":true,"firstPublished":"2018-06-08","source":"Exploit-DB (https://gitlab.com/exploit-database/exploitdb)","entries":[{"edbId":44861,"kind":"exploit","title":"WebKit - Use-After-Free when Resuming Generator","url":"https://www.exploit-db.com/exploits/44861","sourceUrl":"https://gitlab.com/exploit-database/exploitdb/-/blob/main/exploits/multiple/dos/44861.html","file":"exploits/multiple/dos/44861.html","published":"2018-06-08","added":"2018-06-08","updated":"2018-06-08","author":"Google Security Research","type":"dos","platform":"multiple","port":null,"verified":true,"codes":["CVE-2018-4218"],"tags":"Use After Free (UAF)","aliases":null,"applicationUrl":null,"screenshotUrl":null,"referenceUrl":"https://bugs.chromium.org/p/project-zero/issues/detail?id=1553"}]},"verdict":{"level":"urgent","text":"A public exploit is published in Exploit-DB (verified) and the impact is high, while EPSS rates exploitation at 9.1%. Anyone can run this; patch or mitigate before the next change window and check exposed instances for signs of use."},"changes":[{"kind":"epss","label":"EPSS jump","at":"2026-09-21T00:00:00.000Z","detail":{"to":0.11012,"from":0.08964,"percentile":0.95766},"summary":"EPSS moved from 9.0% to 11.0% probability of exploitation in the next thirty days."}],"references":[{"url":"http://www.securitytracker.com/id/1041029","tags":["Third Party Advisory","VDB Entry"],"source":"product-security@apple.com"},{"url":"https://bugs.chromium.org/p/project-zero/issues/detail?id=1553","tags":["Exploit","Issue Tracking","Third Party Advisory"],"source":"product-security@apple.com"},{"url":"https://security.gentoo.org/glsa/201808-04","tags":["Third Party Advisory"],"source":"product-security@apple.com"},{"url":"https://support.apple.com/HT208848","tags":["Vendor Advisory"],"source":"product-security@apple.com"},{"url":"https://support.apple.com/HT208850","tags":["Vendor Advisory"],"source":"product-security@apple.com"},{"url":"https://support.apple.com/HT208851","tags":["Vendor Advisory"],"source":"product-security@apple.com"},{"url":"https://support.apple.com/HT208852","tags":["Vendor Advisory"],"source":"product-security@apple.com"},{"url":"https://support.apple.com/HT208853","tags":["Vendor Advisory"],"source":"product-security@apple.com"},{"url":"https://support.apple.com/HT208854","tags":["Vendor Advisory"],"source":"product-security@apple.com"},{"url":"https://usn.ubuntu.com/3687-1/","tags":["Third Party Advisory"],"source":"product-security@apple.com"},{"url":"https://www.exploit-db.com/exploits/44861/","tags":["Third Party Advisory","VDB Entry"],"source":"product-security@apple.com"},{"url":"http://www.securitytracker.com/id/1041029","tags":["Third Party Advisory","VDB Entry"],"source":"af854a3a-2127-422b-91ae-364da2661108"},{"url":"https://bugs.chromium.org/p/project-zero/issues/detail?id=1553","tags":["Exploit","Issue Tracking","Third Party Advisory"],"source":"af854a3a-2127-422b-91ae-364da2661108"},{"url":"https://security.gentoo.org/glsa/201808-04","tags":["Third Party Advisory"],"source":"af854a3a-2127-422b-91ae-364da2661108"},{"url":"https://support.apple.com/HT208848","tags":["Vendor Advisory"],"source":"af854a3a-2127-422b-91ae-364da2661108"},{"url":"https://support.apple.com/HT208850","tags":["Vendor Advisory"],"source":"af854a3a-2127-422b-91ae-364da2661108"},{"url":"https://support.apple.com/HT208851","tags":["Vendor Advisory"],"source":"af854a3a-2127-422b-91ae-364da2661108"},{"url":"https://support.apple.com/HT208852","tags":["Vendor Advisory"],"source":"af854a3a-2127-422b-91ae-364da2661108"},{"url":"https://support.apple.com/HT208853","tags":["Vendor Advisory"],"source":"af854a3a-2127-422b-91ae-364da2661108"},{"url":"https://support.apple.com/HT208854","tags":["Vendor Advisory"],"source":"af854a3a-2127-422b-91ae-364da2661108"},{"url":"https://usn.ubuntu.com/3687-1/","tags":["Third Party Advisory"],"source":"af854a3a-2127-422b-91ae-364da2661108"},{"url":"https://www.exploit-db.com/exploits/44861/","tags":["Third Party Advisory","VDB Entry"],"source":"af854a3a-2127-422b-91ae-364da2661108"}],"sources":{"nvd":"https://nvd.nist.gov/vuln/detail/CVE-2018-4218","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."}