{"id":"CVE-2018-8034","url":"https://www.cyber-defence.io/tools/cve/CVE-2018-8034","generatedAt":"2026-10-28T21:17:19.416Z","title":"The host name verification when using TLS with the WebSocket client was missing.","description":"The host name verification when using TLS with the WebSocket client was missing. It is now enabled by default. Versions Affected: Apache Tomcat 9.0.0.M1 to 9.0.9, 8.5.0 to 8.5.31, 8.0.0.RC1 to 8.0.52, and 7.0.35 to 7.0.88.","published":"2018-08-01T18:29:00.000Z","lastModified":"2026-06-17T02:04:08.000Z","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:H/I:N/A:N"},"cwe":["CWE-295"],"affected":["apache/tomcat","canonical/ubuntu linux","debian/debian linux","oracle/retail order broker"],"epss":{"score":0.21048,"percentile":0.97563,"date":"2026-10-27","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 21.0%, higher than 98% 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/%3C20180722091057.GA70283%40minotaur.apache.org%3E","source":"security@apache.org"},{"url":"http://www.oracle.com/technetwork/security-advisory/cpuoct2018-4428296.html","tags":["Patch","Third Party Advisory"],"source":"security@apache.org"},{"url":"http://www.securityfocus.com/bid/104895","tags":["Third Party Advisory","VDB Entry"],"source":"security@apache.org"},{"url":"http://www.securitytracker.com/id/1041374","tags":["Third Party Advisory","VDB Entry"],"source":"security@apache.org"},{"url":"https://access.redhat.com/errata/RHSA-2019:0130","tags":["Third Party Advisory"],"source":"security@apache.org"},{"url":"https://access.redhat.com/errata/RHSA-2019:0131","tags":["Third Party Advisory"],"source":"security@apache.org"},{"url":"https://access.redhat.com/errata/RHSA-2019:0450","tags":["Third Party Advisory"],"source":"security@apache.org"},{"url":"https://access.redhat.com/errata/RHSA-2019:0451","tags":["Third Party Advisory"],"source":"security@apache.org"},{"url":"https://access.redhat.com/errata/RHSA-2019:1159","source":"security@apache.org"},{"url":"https://access.redhat.com/errata/RHSA-2019:1160","source":"security@apache.org"},{"url":"https://access.redhat.com/errata/RHSA-2019:1161","source":"security@apache.org"},{"url":"https://access.redhat.com/errata/RHSA-2019:1162","source":"security@apache.org"},{"url":"https://access.redhat.com/errata/RHSA-2019:1529","source":"security@apache.org"},{"url":"https://access.redhat.com/errata/RHSA-2019:2205","source":"security@apache.org"},{"url":"https://access.redhat.com/errata/RHSA-2019:3892","source":"security@apache.org"},{"url":"https://lists.apache.org/thread.html/1dd0a59c1295cc08ce4c9e7edae5ad2268acc9ba55adcefa0532e5ba%40%3Cdev.tomcat.apache.org%3E","source":"security@apache.org"},{"url":"https://lists.apache.org/thread.html/343558d982879bf88ec20dbf707f8c11255f8e219e81d45c4f8d0551%40%3Cdev.tomcat.apache.org%3E","source":"security@apache.org"},{"url":"https://lists.apache.org/thread.html/388a323769f1dff84c9ec905455aa73fbcb20338e3c7eb131457f708%40%3Cdev.tomcat.apache.org%3E","source":"security@apache.org"},{"url":"https://lists.apache.org/thread.html/3d19773b4cf0377db62d1e9328bf9160bf1819f04f988315086931d7%40%3Cdev.tomcat.apache.org%3E","source":"security@apache.org"},{"url":"https://lists.apache.org/thread.html/5c0e00fd31efc11e147bf99d0f03c00a734447d3b131ab0818644cdb%40%3Cdev.tomcat.apache.org%3E","source":"security@apache.org"},{"url":"https://lists.apache.org/thread.html/6af47120905aa7d8fe12f42e8ff2284fb338ba141d3b77b8c7cb61b3%40%3Cdev.tomcat.apache.org%3E","source":"security@apache.org"},{"url":"https://lists.apache.org/thread.html/845312a10aabbe2c499fca94003881d2c79fc993d85f34c1f5c77424%40%3Cdev.tomcat.apache.org%3E","source":"security@apache.org"},{"url":"https://lists.apache.org/thread.html/88855876c33f2f9c532ffb75bfee570ccf0b17ffa77493745af9a17a%40%3Cdev.tomcat.apache.org%3E","source":"security@apache.org"},{"url":"https://lists.apache.org/thread.html/ac51944aef91dd5006b8510b0bef337adaccfe962fb90e7af9c22db4%40%3Cissues.activemq.apache.org%3E","source":"security@apache.org"},{"url":"https://lists.apache.org/thread.html/b5e3f51d28cd5d9b1809f56594f2cf63dcd6a90429e16ea9f83bbedc%40%3Cdev.tomcat.apache.org%3E","source":"security@apache.org"},{"url":"https://lists.apache.org/thread.html/e85e83e9954f169bbb77b44baae5a33d8de878df557bb32b7f793661%40%3Cdev.tomcat.apache.org%3E","source":"security@apache.org"},{"url":"https://lists.apache.org/thread.html/eb6efa8d59c45a7a9eff94c4b925467d3b3fec8ba7697f3daa314b04%40%3Cdev.tomcat.apache.org%3E","source":"security@apache.org"},{"url":"https://lists.apache.org/thread.html/r3bbb800a816d0a51eccc5a228c58736960a9fffafa581a225834d97d%40%3Cdev.tomcat.apache.org%3E","source":"security@apache.org"},{"url":"https://lists.apache.org/thread.html/r48c1444845fe15a823e1374674bfc297d5008a5453788099ea14caf0%40%3Cdev.tomcat.apache.org%3E","source":"security@apache.org"},{"url":"https://lists.apache.org/thread.html/r6ccee4e849bc77df0840c7f853f6bd09d426f6741247da2b7429d5d9%40%3Cdev.tomcat.apache.org%3E","source":"security@apache.org"},{"url":"https://lists.apache.org/thread.html/r9136ff5b13e4f1941360b5a309efee2c114a14855578c3a2cbe5d19c%40%3Cdev.tomcat.apache.org%3E","source":"security@apache.org"},{"url":"https://lists.apache.org/thread.html/raba0fabaf4d56d4325ab2aca8814f0b30a237ab83d8106b115ee279a%40%3Cdev.tomcat.apache.org%3E","source":"security@apache.org"},{"url":"https://lists.debian.org/debian-lts-announce/2018/07/msg00047.html","tags":["Third Party Advisory"],"source":"security@apache.org"},{"url":"https://lists.debian.org/debian-lts-announce/2018/09/msg00001.html","tags":["Mailing List","Third 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://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":"https://www.oracle.com/technetwork/security-advisory/cpuapr2019-5072813.html","tags":["Patch","Third Party Advisory"],"source":"security@apache.org"},{"url":"https://www.oracle.com/technetwork/security-advisory/cpujul2019-5072835.html","source":"security@apache.org"},{"url":"https://www.oracle.com/technetwork/security-advisory/cpuoct2019-5072832.html","source":"security@apache.org"},{"url":"http://mail-archives.us.apache.org/mod_mbox/www-announce/201807.mbox/%3C20180722091057.GA70283%40minotaur.apache.org%3E","source":"af854a3a-2127-422b-91ae-364da2661108"},{"url":"http://www.oracle.com/technetwork/security-advisory/cpuoct2018-4428296.html","tags":["Patch","Third Party Advisory"],"source":"af854a3a-2127-422b-91ae-364da2661108"},{"url":"http://www.securityfocus.com/bid/104895","tags":["Third Party Advisory","VDB Entry"],"source":"af854a3a-2127-422b-91ae-364da2661108"},{"url":"http://www.securitytracker.com/id/1041374","tags":["Third Party Advisory","VDB Entry"],"source":"af854a3a-2127-422b-91ae-364da2661108"},{"url":"https://access.redhat.com/errata/RHSA-2019:0130","tags":["Third Party Advisory"],"source":"af854a3a-2127-422b-91ae-364da2661108"},{"url":"https://access.redhat.com/errata/RHSA-2019:0131","tags":["Third Party Advisory"],"source":"af854a3a-2127-422b-91ae-364da2661108"},{"url":"https://access.redhat.com/errata/RHSA-2019:0450","tags":["Third Party Advisory"],"source":"af854a3a-2127-422b-91ae-364da2661108"},{"url":"https://access.redhat.com/errata/RHSA-2019:0451","tags":["Third Party Advisory"],"source":"af854a3a-2127-422b-91ae-364da2661108"},{"url":"https://access.redhat.com/errata/RHSA-2019:1159","source":"af854a3a-2127-422b-91ae-364da2661108"},{"url":"https://access.redhat.com/errata/RHSA-2019:1160","source":"af854a3a-2127-422b-91ae-364da2661108"},{"url":"https://access.redhat.com/errata/RHSA-2019:1161","source":"af854a3a-2127-422b-91ae-364da2661108"},{"url":"https://access.redhat.com/errata/RHSA-2019:1162","source":"af854a3a-2127-422b-91ae-364da2661108"},{"url":"https://access.redhat.com/errata/RHSA-2019:1529","source":"af854a3a-2127-422b-91ae-364da2661108"},{"url":"https://access.redhat.com/errata/RHSA-2019:2205","source":"af854a3a-2127-422b-91ae-364da2661108"},{"url":"https://access.redhat.com/errata/RHSA-2019:3892","source":"af854a3a-2127-422b-91ae-364da2661108"},{"url":"https://lists.apache.org/thread.html/1dd0a59c1295cc08ce4c9e7edae5ad2268acc9ba55adcefa0532e5ba%40%3Cdev.tomcat.apache.org%3E","source":"af854a3a-2127-422b-91ae-364da2661108"},{"url":"https://lists.apache.org/thread.html/343558d982879bf88ec20dbf707f8c11255f8e219e81d45c4f8d0551%40%3Cdev.tomcat.apache.org%3E","source":"af854a3a-2127-422b-91ae-364da2661108"},{"url":"https://lists.apache.org/thread.html/388a323769f1dff84c9ec905455aa73fbcb20338e3c7eb131457f708%40%3Cdev.tomcat.apache.org%3E","source":"af854a3a-2127-422b-91ae-364da2661108"},{"url":"https://lists.apache.org/thread.html/3d19773b4cf0377db62d1e9328bf9160bf1819f04f988315086931d7%40%3Cdev.tomcat.apache.org%3E","source":"af854a3a-2127-422b-91ae-364da2661108"}],"sources":{"nvd":"https://nvd.nist.gov/vuln/detail/CVE-2018-8034","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."}