{"id":"CVE-2013-4286","url":"https://www.cyber-defence.io/tools/cve/CVE-2013-4286","generatedAt":"2026-10-28T04:16:06.146Z","title":"Apache Tomcat before 6.0.39, 7.x before 7.0.47, and 8.x before 8.0.0-RC3, when an HTTP connector or AJP connector is used, does not properly handle certain inconsistent HTTP request headers, which allows remote attackers to trigger incorrect…","description":"Apache Tomcat before 6.0.39, 7.x before 7.0.47, and 8.x before 8.0.0-RC3, when an HTTP connector or AJP connector is used, does not properly handle certain inconsistent HTTP request headers, which allows remote attackers to trigger incorrect identification of a request's length and conduct request-smuggling attacks via (1) multiple Content-Length headers or (2) a Content-Length header and a \"Transfer-Encoding: chunked\" header.  NOTE: this vulnerability exists because of an incomplete fix for CVE-2005-2090.","published":"2014-02-26T14:55:08.000Z","lastModified":"2026-10-09T20:17:07.000Z","status":"Modified","sourceIdentifier":"secalert@redhat.com","cvss":{"version":"2.0","score":5.8,"severity":"MEDIUM","vector":"AV:N/AC:M/Au:N/C:P/I:P/A:N"},"cwe":["CWE-20"],"affected":["apache/tomcat"],"epss":{"score":0.16206,"percentile":0.96924,"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 16.2%, higher than 97% of all known CVEs. Patch or mitigate before the next change window."},"changes":[],"references":[{"url":"http://advisories.mageia.org/MGASA-2014-0148.html","source":"secalert@redhat.com"},{"url":"http://marc.info/?l=bugtraq&m=141390017113542&w=2","source":"secalert@redhat.com"},{"url":"http://marc.info/?l=bugtraq&m=144498216801440&w=2","source":"secalert@redhat.com"},{"url":"http://rhn.redhat.com/errata/RHSA-2014-0343.html","source":"secalert@redhat.com"},{"url":"http://rhn.redhat.com/errata/RHSA-2014-0344.html","source":"secalert@redhat.com"},{"url":"http://rhn.redhat.com/errata/RHSA-2014-0345.html","source":"secalert@redhat.com"},{"url":"http://seclists.org/fulldisclosure/2014/Dec/23","source":"secalert@redhat.com"},{"url":"http://secunia.com/advisories/57675","source":"secalert@redhat.com"},{"url":"http://secunia.com/advisories/59036","source":"secalert@redhat.com"},{"url":"http://secunia.com/advisories/59675","source":"secalert@redhat.com"},{"url":"http://secunia.com/advisories/59722","source":"secalert@redhat.com"},{"url":"http://secunia.com/advisories/59724","source":"secalert@redhat.com"},{"url":"http://secunia.com/advisories/59733","source":"secalert@redhat.com"},{"url":"http://secunia.com/advisories/59873","source":"secalert@redhat.com"},{"url":"http://svn.apache.org/viewvc?view=revision&revision=1521829","source":"secalert@redhat.com"},{"url":"http://svn.apache.org/viewvc?view=revision&revision=1521854","source":"secalert@redhat.com"},{"url":"http://svn.apache.org/viewvc?view=revision&revision=1552565","source":"secalert@redhat.com"},{"url":"http://tomcat.apache.org/security-6.html","tags":["Vendor 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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."}