{"id":"CVE-2011-3186","url":"https://www.cyber-defence.io/tools/cve/CVE-2011-3186","generatedAt":"2026-10-27T17:57:34.552Z","title":"CRLF injection vulnerability in actionpack/lib/action_controller/response.rb in Ruby on Rails 2.3.x before 2.3.13 allows remote attackers to inject arbitrary HTTP headers and conduct HTTP response splitting attacks via the Content-Type header.","description":"CRLF injection vulnerability in actionpack/lib/action_controller/response.rb in Ruby on Rails 2.3.x before 2.3.13 allows remote attackers to inject arbitrary HTTP headers and conduct HTTP response splitting attacks via the Content-Type header.","published":"2011-08-29T18:55:02.000Z","lastModified":"2026-06-16T23:32:50.000Z","status":"Modified","sourceIdentifier":"secalert@redhat.com","cvss":{"version":"2.0","score":4.3,"severity":"MEDIUM","vector":"AV:N/AC:M/Au:N/C:N/I:P/A:N"},"cwe":["CWE-94"],"affected":["rubyonrails/rails"],"epss":{"score":0.01748,"percentile":0.77676,"date":"2026-10-26","history":[]},"kev":{"listed":false},"exploits":{"count":0,"verified":false,"firstPublished":null,"source":"Exploit-DB (https://gitlab.com/exploit-database/exploitdb)","entries":[]},"verdict":{"level":"low","text":"Lower severity and a low EPSS score (1.75%). Track it; it rarely justifies an emergency change on its own."},"changes":[],"references":[{"url":"http://groups.google.com/group/rubyonrails-security/msg/bbe342e43abaa78c?dmode=source&output=gplain","tags":["Patch"],"source":"secalert@redhat.com"},{"url":"http://lists.fedoraproject.org/pipermail/package-announce/2011-September/065137.html","source":"secalert@redhat.com"},{"url":"http://secunia.com/advisories/45921","source":"secalert@redhat.com"},{"url":"http://www.debian.org/security/2011/dsa-2301","source":"secalert@redhat.com"},{"url":"http://www.openwall.com/lists/oss-security/2011/08/17/1","tags":["Patch"],"source":"secalert@redhat.com"},{"url":"http://www.openwall.com/lists/oss-security/2011/08/19/11","tags":["Patch"],"source":"secalert@redhat.com"},{"url":"http://www.openwall.com/lists/oss-security/2011/08/20/1","tags":["Patch"],"source":"secalert@redhat.com"},{"url":"http://www.openwall.com/lists/oss-security/2011/08/22/13","tags":["Patch"],"source":"secalert@redhat.com"},{"url":"http://www.openwall.com/lists/oss-security/2011/08/22/14","source":"secalert@redhat.com"},{"url":"http://www.openwall.com/lists/oss-security/2011/08/22/5","tags":["Patch"],"source":"secalert@redhat.com"},{"url":"https://bugzilla.redhat.com/show_bug.cgi?id=732156","tags":["Patch"],"source":"secalert@redhat.com"},{"url":"https://github.com/rails/rails/commit/11dafeaa7533be26441a63618be93a03869c83a9","tags":["Patch"],"source":"secalert@redhat.com"},{"url":"http://groups.google.com/group/rubyonrails-security/msg/bbe342e43abaa78c?dmode=source&output=gplain","tags":["Patch"],"source":"af854a3a-2127-422b-91ae-364da2661108"},{"url":"http://lists.fedoraproject.org/pipermail/package-announce/2011-September/065137.html","source":"af854a3a-2127-422b-91ae-364da2661108"},{"url":"http://secunia.com/advisories/45921","source":"af854a3a-2127-422b-91ae-364da2661108"},{"url":"http://www.debian.org/security/2011/dsa-2301","source":"af854a3a-2127-422b-91ae-364da2661108"},{"url":"http://www.openwall.com/lists/oss-security/2011/08/17/1","tags":["Patch"],"source":"af854a3a-2127-422b-91ae-364da2661108"},{"url":"http://www.openwall.com/lists/oss-security/2011/08/19/11","tags":["Patch"],"source":"af854a3a-2127-422b-91ae-364da2661108"},{"url":"http://www.openwall.com/lists/oss-security/2011/08/20/1","tags":["Patch"],"source":"af854a3a-2127-422b-91ae-364da2661108"},{"url":"http://www.openwall.com/lists/oss-security/2011/08/22/13","tags":["Patch"],"source":"af854a3a-2127-422b-91ae-364da2661108"},{"url":"http://www.openwall.com/lists/oss-security/2011/08/22/14","source":"af854a3a-2127-422b-91ae-364da2661108"},{"url":"http://www.openwall.com/lists/oss-security/2011/08/22/5","tags":["Patch"],"source":"af854a3a-2127-422b-91ae-364da2661108"},{"url":"https://bugzilla.redhat.com/show_bug.cgi?id=732156","tags":["Patch"],"source":"af854a3a-2127-422b-91ae-364da2661108"},{"url":"https://github.com/rails/rails/commit/11dafeaa7533be26441a63618be93a03869c83a9","tags":["Patch"],"source":"af854a3a-2127-422b-91ae-364da2661108"}],"sources":{"nvd":"https://nvd.nist.gov/vuln/detail/CVE-2011-3186","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."}