CVE-2019-12387
In Twisted before 19.2.1, twisted.web did not validate or sanitize URIs or HTTP methods, allowing an attacker to inject invalid characters such as CRLF.
Date published : 2019-06-10
https://github.com/twisted/twisted/commit/6c61fc4503ae39ab8ecee52d10f10ee2c371d7e2
https://labs.twistedmatrix.com/2019/06/twisted-1921-released.html