{"id":"CVE-2011-3186","aliases":["DEBIAN-CVE-2011-3186","DSA-2301-1","EUVD-2017-0225","GHSA-fcqf-h4h4-695m"],"status":"published","title":"actionpack CRLF injection vulnerability","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.","severity":{"version":"2.0","score":4.3,"vector":"AV:N/AC:M/Au:N/C:N/I:P/A:N","level":"medium","assessor":"primary","from":"nvd"},"epss":{"day":"2026-11-08","score":0.01748,"percentile":0.77981,"model":"v2026.06.15"},"facts":{"in_kev":false,"known_exploited":false,"public_exploit":false,"fix_available":true},"cwes":["CWE-94"],"published":"2011-08-29T18:00:00Z","modified":"2026-10-23T17:47:37Z","fixes":[{"ecosystem":"RubyGems","package":"actionpack","fixed_in":["2.3.13"],"sources":["ghsa","osv"]},{"ecosystem":"Debian:12","package":"rails","fixed_in":["2.3.14"],"sources":["osv"]},{"ecosystem":"Debian:13","package":"rails","fixed_in":["2.3.14"],"sources":["osv"]},{"ecosystem":"Debian:14","package":"rails","fixed_in":["2.3.14"],"sources":["osv"]}],"affected":[{"source":"ghsa","ecosystem":"RubyGems","package":"actionpack","ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"2.3.0"},{"fixed":"2.3.13"}]}]},{"source":"osv","ecosystem":"Debian:12","package":"rails","ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"0"},{"fixed":"2.3.14"}]}]},{"source":"osv","ecosystem":"Debian:13","package":"rails","ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"0"},{"fixed":"2.3.14"}]}]},{"source":"osv","ecosystem":"Debian:14","package":"rails","ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"0"},{"fixed":"2.3.14"}]}]},{"source":"osv","ecosystem":"Debian:6.0","package":"rails","ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"0"},{"fixed":"2.3.5-1.2+squeeze1"}]}],"versions":["2.3.5-1.2","2.3.5-1.2+squeeze0.1"],"bundled":4},{"source":"osv","ecosystem":"Debian:5.0","package":"rails","ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"0"},{"fixed":"2.1.0-7+lenny1"}]}],"versions":["2.1.0-6","2.1.0-7","2.1.0-7+lenny0.1","2.1.0-7+lenny0.2"],"bundled":4},{"source":"osv","ecosystem":"RubyGems","package":"actionpack","ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"2.3.0"},{"fixed":"2.3.13"}]}],"versions":["2.3.10","2.3.11","2.3.12","2.3.2","2.3.3","2.3.4","2.3.5","2.3.6","2.3.7","2.3.8","2.3.8.pre1","2.3.9","2.3.9.pre"]}],"products":[{"vendor":"rubyonrails","product":"rails"}],"references":[{"url":"http://www.openwall.com/lists/oss-security/2011/08/17/1","tags":["mailing-list","x_refsource_MLIST","x_transferred","Patch","fix","web"]},{"url":"http://www.openwall.com/lists/oss-security/2011/08/22/13","tags":["mailing-list","x_refsource_MLIST","x_transferred","Patch","fix","web"]},{"url":"https://bugzilla.redhat.com/show_bug.cgi?id=732156","tags":["x_refsource_CONFIRM","x_transferred","Patch","fix","web"]},{"url":"http://lists.fedoraproject.org/pipermail/package-announce/2011-September/065137.html","tags":["vendor-advisory","x_refsource_FEDORA","x_transferred","web"]},{"url":"http://www.openwall.com/lists/oss-security/2011/08/19/11","tags":["mailing-list","x_refsource_MLIST","x_transferred","Patch","fix","web"]},{"url":"http://www.debian.org/security/2011/dsa-2301","tags":["vendor-advisory","x_refsource_DEBIAN","x_transferred","advisory","web"]},{"url":"http://secunia.com/advisories/45921","tags":["third-party-advisory","x_refsource_SECUNIA","x_transferred","advisory"]},{"url":"http://www.openwall.com/lists/oss-security/2011/08/20/1","tags":["mailing-list","x_refsource_MLIST","x_transferred","Patch","fix","web"]},{"url":"http://www.openwall.com/lists/oss-security/2011/08/22/14","tags":["mailing-list","x_refsource_MLIST","x_transferred","web"]},{"url":"http://www.openwall.com/lists/oss-security/2011/08/22/5","tags":["mailing-list","x_refsource_MLIST","x_transferred","Patch","fix","web"]},{"url":"https://github.com/rails/rails/commit/11dafeaa7533be26441a63618be93a03869c83a9","tags":["x_refsource_CONFIRM","x_transferred","Patch","fix","web"]},{"url":"http://groups.google.com/group/rubyonrails-security/msg/bbe342e43abaa78c?dmode=source\u0026output=gplain","tags":["mailing-list","x_refsource_MLIST","x_transferred","Patch","fix","web"]},{"url":"https://nvd.nist.gov/vuln/detail/CVE-2011-3186","tags":["advisory"]},{"url":"https://github.com/rubysec/ruby-advisory-db/blob/master/gems/actionpack/CVE-2011-3186.yml","tags":["web"]},{"url":"https://groups.google.com/forum/#!topic/rubyonrails-security/b_yTveAph2g","tags":["web"]},{"url":"https://web.archive.org/web/20150201000000*/http://secunia.com/advisories/45921","tags":["web"]},{"url":"https://github.com/advisories/GHSA-fcqf-h4h4-695m"},{"url":"https://security-tracker.debian.org/tracker/CVE-2011-3186","tags":["advisory"]},{"url":"https://github.com/rails/rails","tags":["package"]}],"sources":{"cve":[{"id":"CVE-2011-3186","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.","status":"published","published":"2011-08-29T18:00:00Z","modified":"2024-08-06T23:22:27.747Z","updated_at":"2026-11-02T14:35:37.324501Z"}],"euvd":[{"id":"EUVD-2017-0225","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.","status":"published","published":"2011-08-29T18:00:00Z","modified":"2024-08-06T23:22:27Z","updated_at":"2026-11-03T01:39:52.582864Z"}],"ghsa":[{"id":"GHSA-fcqf-h4h4-695m","title":"actionpack CRLF injection vulnerability","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.","status":"published","published":"2017-10-24T18:33:38Z","modified":"2023-11-06T05:01:55Z","cwes":["CWE-94"],"updated_at":"2026-11-02T14:37:14.234712Z"}],"nvd":[{"id":"CVE-2011-3186","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.","status":"published","published":"2011-08-29T18:55:01.643Z","modified":"2026-06-16T23:32:49.65Z","cvss":[{"version":"2.0","score":4.3,"vector":"AV:N/AC:M/Au:N/C:N/I:P/A:N","level":"medium","assessor":"primary"}],"cwes":["CWE-94"],"updated_at":"2026-11-02T14:02:09.988332Z"}],"osv":[{"id":"CVE-2011-3186","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.","status":"published","published":"2011-08-29T18:55:01Z","modified":"2026-04-10T03:41:56.974593Z","updated_at":"2026-11-02T15:43:58.279353Z"},{"id":"DEBIAN-CVE-2011-3186","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.","status":"published","published":"2011-08-29T18:55:01.643Z","modified":"2026-10-23T17:47:37.993951526Z","updated_at":"2026-11-02T15:45:24.612044Z"},{"id":"DSA-2301-1","title":"rails - several","status":"published","published":"2011-09-05T00:00:00Z","modified":"2026-03-09T01:21:41.318889Z","updated_at":"2026-11-02T15:46:15.108335Z"},{"id":"GHSA-fcqf-h4h4-695m","title":"actionpack CRLF injection vulnerability","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.","status":"published","published":"2017-10-24T18:33:38Z","modified":"2024-12-05T05:27:27.352808Z","cwes":["CWE-94"],"updated_at":"2026-11-02T15:46:46.39441Z"}]}}