CVE-2012-2374: Tornadoweb Tornado

Medium severity, CVSS 5.0. EPSS: 1.4% chance of exploitation in the next 30 days.

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.

Affected products

• Tornadoweb Tornado: up to and including 2.2; version 1.0 only; version 1.0.1 only; version 1.1 only; version 1.1.1 only; version 1.2 only; …

Published 2012-05-23. Last modified 2026-06-16.