{"id":"CVE-2019-11236","aliases":["GHSA-r64q-w8jr-g9qp","PYSEC-2019-132"],"url":"https://o3.security/vulnerability/CVE-2019-11236","summary":"Improper Neutralization of CRLF Sequences in urllib3 library for Python","details":"In the urllib3 library through 1.24.1 for Python, CRLF injection is possible if the attacker controls the request parameter.","published":"2019-04-15T15:29:00.637Z","modified":"2026-08-07T15:00:00.979301Z","cvss":{"score":6.1,"severity":"MEDIUM","vector":"CVSS:3.0/AV:N/AC:L/PR:N/UI:R/S:C/C:L/I:L/A:N"},"epss":null,"cisaKev":null,"exploitsKnown":1,"affectedPackages":[{"ecosystem":"PyPI","name":"urllib3","fixedVersion":"1.24.3"}],"fix":null,"references":[{"type":"WEB","url":"http://lists.opensuse.org/opensuse-security-announce/2019-09/msg00039.html"},{"type":"WEB","url":"http://lists.opensuse.org/opensuse-security-announce/2019-09/msg00041.html"},{"type":"WEB","url":"https://lists.debian.org/debian-lts-announce/2019/06/msg00016.html"},{"type":"WEB","url":"https://lists.debian.org/debian-lts-announce/2021/06/msg00015.html"},{"type":"WEB","url":"https://lists.debian.org/debian-lts-announce/2023/10/msg00012.html"},{"type":"WEB","url":"https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/NKGPJLVLVYCL4L4B4G5TIOTVK4BKPG72/"},{"type":"WEB","url":"https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/R62XGEYPUTXMRHGX5I37EBCGQ5COHGKR/"},{"type":"WEB","url":"https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/TBI45HO533KYHNB5YRO43TBYKA3E3VRL/"},{"type":"WEB","url":"https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/XOSA2NT4DUQDBEIWE6O7KKD24XND7TE2/"},{"type":"WEB","url":"https://usn.ubuntu.com/3990-1/"},{"type":"WEB","url":"https://usn.ubuntu.com/3990-2/"},{"type":"ADVISORY","url":"https://access.redhat.com/errata/RHSA-2019:2272"},{"type":"ADVISORY","url":"https://access.redhat.com/errata/RHSA-2019:3335"},{"type":"ADVISORY","url":"https://access.redhat.com/errata/RHSA-2019:3590"},{"type":"REPORT","url":"https://github.com/urllib3/urllib3/issues/1553"}],"provenance":{"sources":["OSV.dev","FIRST.org (EPSS)"],"lastVerified":"2026-08-07T15:00:00.979301Z"}}