{"id":"CVE-2019-12387","aliases":["GHSA-6cc5-2vg4-cc7m","PYSEC-2019-128"],"url":"https://o3.security/vulnerability/CVE-2019-12387","summary":"Twisted CRLF Injection","details":"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.","published":"2019-06-10T12:29:00.287Z","modified":"2026-07-08T05:52:52.378771965Z","cvss":{"score":6.1,"severity":"MEDIUM","vector":"CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:C/C:L/I:L/A:N"},"epss":null,"cisaKev":null,"exploitsKnown":2,"affectedPackages":[{"ecosystem":"PyPI","name":"twisted","fixedVersion":"19.2.1"}],"fix":{"url":"https://github.com/twisted/twisted/commit/6c61fc4503ae39ab8ecee52d10f10ee2c371d7e2","label":"twisted/twisted@6c61fc4"},"references":[{"type":"WEB","url":"http://lists.opensuse.org/opensuse-security-announce/2019-07/msg00030.html"},{"type":"WEB","url":"http://lists.opensuse.org/opensuse-security-announce/2019-07/msg00042.html"},{"type":"WEB","url":"https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/2G5RPDQ4BNB336HL6WW5ZJ344MAWNN7N/"},{"type":"ADVISORY","url":"https://usn.ubuntu.com/4308-1/"},{"type":"ADVISORY","url":"https://usn.ubuntu.com/4308-2/"},{"type":"FIX","url":"https://github.com/twisted/twisted/commit/6c61fc4503ae39ab8ecee52d10f10ee2c371d7e2"},{"type":"FIX","url":"https://www.oracle.com/security-alerts/cpuapr2020.html"},{"type":"EVIDENCE","url":"https://labs.twistedmatrix.com/2019/06/twisted-1921-released.html"},{"type":"EVIDENCE","url":"https://twistedmatrix.com/pipermail/twisted-python/2019-June/032352.html"}],"provenance":{"sources":["OSV.dev","FIRST.org (EPSS)"],"lastVerified":"2026-07-08T05:52:52.378771965Z"}}