{"id":"CVE-2018-1336","url":"https://www.cyber-defence.io/tools/cve/CVE-2018-1336","generatedAt":"2026-10-29T03:45:56.770Z","title":"An improper handing of overflow in the UTF-8 decoder with supplementary characters can lead to an infinite loop in the decoder causing a Denial of Service.","description":"An improper handing of overflow in the UTF-8 decoder with supplementary characters can lead to an infinite loop in the decoder causing a Denial of Service. Versions Affected: Apache Tomcat 9.0.0.M9 to 9.0.7, 8.5.0 to 8.5.30, 8.0.0.RC1 to 8.0.51, and 7.0.28 to 7.0.86.","published":"2018-08-02T14:29:00.000Z","lastModified":"2026-06-17T01:51:03.000Z","status":"Modified","sourceIdentifier":"security@apache.org","cvss":{"version":"3.1","score":7.5,"severity":"HIGH","vector":"CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H"},"cwe":["CWE-835"],"affected":["apache/tomcat","redhat/jboss enterprise application platform","canonical/ubuntu linux","debian/debian linux","redhat/jboss enterprise web server","redhat/enterprise linux desktop","redhat/enterprise linux server","redhat/enterprise linux workstation"],"epss":{"score":0.20354,"percentile":0.97477,"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":"urgent","text":"EPSS puts the probability of exploitation in the next 30 days at 20.4%, higher than 97% of all known CVEs. Patch or mitigate before the next change window."},"changes":[],"references":[{"url":"http://mail-archives.us.apache.org/mod_mbox/www-announce/201807.mbox/%3C20180722090435.GA60759%40minotaur.apache.org%3E","tags":["Mailing List","Vendor Advisory"],"source":"security@apache.org"},{"url":"http://www.securityfocus.com/bid/104898","tags":["Third Party Advisory","VDB Entry"],"source":"security@apache.org"},{"url":"http://www.securitytracker.com/id/1041375","tags":["Third Party Advisory","VDB Entry"],"source":"security@apache.org"},{"url":"https://access.redhat.com/errata/RHEA-2018:2188","tags":["Third Party Advisory"],"source":"security@apache.org"},{"url":"https://access.redhat.com/errata/RHEA-2018:2189","tags":["Third Party Advisory"],"source":"security@apache.org"},{"url":"https://access.redhat.com/errata/RHSA-2018:2700","tags":["Third Party Advisory"],"source":"security@apache.org"},{"url":"https://access.redhat.com/errata/RHSA-2018:2701","tags":["Third Party 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Party Advisory"],"source":"security@apache.org"},{"url":"https://security.netapp.com/advisory/ntap-20180817-0001/","tags":["Third Party Advisory"],"source":"security@apache.org"},{"url":"https://support.f5.com/csp/article/K73008537?utm_source=f5support&amp%3Butm_medium=RSS","source":"security@apache.org"},{"url":"https://usn.ubuntu.com/3723-1/","tags":["Third Party Advisory"],"source":"security@apache.org"},{"url":"https://www.debian.org/security/2018/dsa-4281","tags":["Third Party Advisory"],"source":"security@apache.org"},{"url":"https://www.oracle.com/security-alerts/cpuapr2020.html","source":"security@apache.org"},{"url":"http://mail-archives.us.apache.org/mod_mbox/www-announce/201807.mbox/%3C20180722090435.GA60759%40minotaur.apache.org%3E","tags":["Mailing List","Vendor Advisory"],"source":"af854a3a-2127-422b-91ae-364da2661108"},{"url":"http://www.securityfocus.com/bid/104898","tags":["Third Party Advisory","VDB 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BY 4.0 — link back to the CVE Explorer if you publish the results; upstream data remains subject to its own terms."}