{"id":"CVE-2012-2374","aliases":["GHSA-f7fv-v9rh-prvc","PYSEC-2012-5"],"url":"https://o3.security/vulnerability/CVE-2012-2374","summary":"Tornado CRLF injection vulnerability","details":"CRLF injection vulnerability in the tornado.web.RequestHandler.set_header function in Tornado before 2.2.1 allows remote attackers to inject arbitrary HTTP headers and conduct HTTP response splitting attacks via crafted input.","published":"2012-05-23T20:55:01Z","modified":"2026-04-10T03:42:19.498273Z","cvss":{"score":7.5,"severity":"HIGH","vector":"CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:H/A:N"},"epss":{"score":0.01373,"percentile":0.70646,"asOf":"2026-09-17"},"cisaKev":null,"exploitsKnown":0,"affectedPackages":[{"ecosystem":"PyPI","name":"tornado","fixedVersion":"2.2.1"}],"fix":{"url":"https://github.com/tornadoweb/tornado/commit/1ae91f6d58e6257e0ab49d295d8741ce1727bdb7","label":"tornadoweb/tornado@1ae91f6"},"references":[{"type":"ADVISORY","url":"http://secunia.com/advisories/49185"},{"type":"ADVISORY","url":"http://www.tornadoweb.org/documentation/releases/v2.2.1.html"},{"type":"WEB","url":"http://openwall.com/lists/oss-security/2012/05/18/12"},{"type":"WEB","url":"http://www.openwall.com/lists/oss-security/2012/05/18/6"},{"type":"WEB","url":"http://www.securityfocus.com/bid/53612"},{"type":"ADVISORY","url":"https://nvd.nist.gov/vuln/detail/CVE-2012-2374"},{"type":"WEB","url":"https://github.com/tornadoweb/tornado/commit/1ae91f6d58e6257e0ab49d295d8741ce1727bdb7"},{"type":"WEB","url":"https://github.com/pypa/advisory-database/tree/main/vulns/tornado/PYSEC-2012-5.yaml"},{"type":"PACKAGE","url":"https://github.com/tornadoweb/tornado"},{"type":"WEB","url":"https://web.archive.org/web/20140720192646/http://secunia.com/advisories/49185"},{"type":"WEB","url":"https://web.archive.org/web/20200229124524/http://www.securityfocus.com/bid/53612"}],"provenance":{"sources":["OSV.dev","FIRST.org (EPSS)"],"lastVerified":"2026-04-10T03:42:19.498273Z"}}