{"cve":"CVE-2012-2374","nvd":{"published":"2012-05-23T20:55:01.727","modified":"2026-06-16T23:41:26.620","status":"Modified","description":"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.","cvss_v4":null,"cvss_v3":null,"cwes":["CWE-20"],"references":["http://openwall.com/lists/oss-security/2012/05/18/12","http://secunia.com/advisories/49185","http://www.openwall.com/lists/oss-security/2012/05/18/6","http://www.securityfocus.com/bid/53612","http://www.tornadoweb.org/documentation/releases/v2.2.1.html"],"products":["tornadoweb:tornado"],"source":"nvd","synced_at":"2026-10-19T20:24:00.973572543+00:00"},"epss":{"cve":"CVE-2012-2374","score":0.01358,"percentile":0.71677,"date":"2026-10-31"},"kev":null,"osv":[{"id":"GHSA-f7fv-v9rh-prvc","url":"https://osv.dev/vulnerability/GHSA-f7fv-v9rh-prvc","summary":"Tornado CRLF injection vulnerability","modified":"2024-11-18T22:24:23.207635Z","packages":[{"ecosystem":"PyPI","name":"tornado","purl":"pkg:pypi/tornado","ranges":["<2.2.1"],"fixed":["2.2.1"]}]},{"id":"PYSEC-2012-5","url":"https://osv.dev/vulnerability/PYSEC-2012-5","summary":"","modified":"2026-06-10T17:02:44.203173517Z","packages":[{"ecosystem":"PyPI","name":"tornado","purl":"pkg:pypi/tornado","ranges":["<2.2.1"],"fixed":["2.2.1"]}]}],"attribution":["This product uses the NVD API but is not endorsed or certified by the NVD.","EPSS scores: FIRST Exploit Prediction Scoring System, https://www.first.org/epss","Known exploited vulnerabilities: CISA Known Exploited Vulnerabilities Catalog, https://www.cisa.gov/known-exploited-vulnerabilities-catalog","Package advisories: OSV (https://osv.dev), from the GitHub Advisory Database, PyPA, Go, RustSec and other ecosystem databases, under CC-BY 4.0 or CC0","CVE records: the CVE Program's CVE List (https://www.cve.org), under its terms of use (https://www.cve.org/Legal/TermsOfUse). CVE is a registered trademark of The MITRE Corporation; this product is not affiliated with the CVE Program."]}