{"api_version":"1","generated_at":"2026-04-22T20:52:25+00:00","cve":"CVE-2019-9740","urls":{"html":"https://cve.report/CVE-2019-9740","api":"https://cve.report/api/cve/CVE-2019-9740.json","docs":"https://cve.report/api","cve_org":"https://www.cve.org/CVERecord?id=CVE-2019-9740","nvd":"https://nvd.nist.gov/vuln/detail/CVE-2019-9740"},"summary":{"title":"CVE-2019-9740","description":"An issue was discovered in urllib2 in Python 2.x through 2.7.16 and urllib in Python 3.x through 3.7.3. CRLF injection is possible if the attacker controls a url parameter, as demonstrated by the first argument to urllib.request.urlopen with \\r\\n (specifically in the query string after a ? character) followed by an HTTP header or a Redis command. This is fixed in: v2.7.17, v2.7.17rc1, v2.7.18, v2.7.18rc1; v3.5.10, v3.5.10rc1, v3.5.8, v3.5.8rc1, v3.5.8rc2, v3.5.9; v3.6.10, v3.6.10rc1, v3.6.11, v3.6.11rc1, v3.6.12, v3.6.9, v3.6.9rc1; v3.7.4, v3.7.4rc1, v3.7.4rc2, v3.7.5, v3.7.5rc1, v3.7.6, v3.7.6rc1, v3.7.7, v3.7.7rc1, v3.7.8, v3.7.8rc1, v3.7.9.","state":"PUBLIC","assigner":"cve@mitre.org","published_at":"2019-03-13 03:29:00","updated_at":"2023-11-07 03:13:00"},"problem_types":["CWE-93"],"metrics":[],"references":[{"url":"https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/JCPGLTTOBB3QEARDX4JOYURP6ELNNA2V/","name":"FEDORA-2019-d202cda4f8","refsource":"","tags":[],"title":"[SECURITY] Fedora 29 Update: python35-3.5.8-2.fc29 - package-announce - Fedora Mailing-Lists","mime":"text/html","httpstatus":"200","archivestatus":"200"},{"url":"http://www.securityfocus.com/bid/107466","name":"107466","refsource":"BID","tags":[],"title":"Python CVE-2019-9740 CRLF Injection Vulnerability","mime":"text/html","httpstatus":"200","archivestatus":"0"},{"url":"https://lists.debian.org/debian-lts-announce/2020/07/msg00011.html","name":"[debian-lts-announce] 20200715 [SECURITY] [DLA 2280-1] python3.5 security update","refsource":"MLIST","tags":[],"title":"[SECURITY] [DLA 2280-1] python3.5 security update","mime":"text/html","httpstatus":"200","archivestatus":"200"},{"url":"https://lists.fedoraproject.org/archives/list/package-announce@lists.fedoraproject.org/message/2ORNTF62QPLMJXIQ7KTZQ2776LMIXEKL/","name":"FEDORA-2019-7df59302e0","refsource":"FEDORA","tags":[],"title":"[SECURITY] Fedora 29 Update: python36-3.6.9-1.fc29 - 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CRLF injection is possible if the attacker controls a url parameter, as demonstrated by the first argument to urllib.request.urlopen with \\r\\n (specifically in the query string after a ? character) followed by an HTTP header or a Redis command. This is fixed in: v2.7.17, v2.7.17rc1, v2.7.18, v2.7.18rc1; v3.5.10, v3.5.10rc1, v3.5.8, v3.5.8rc1, v3.5.8rc2, v3.5.9; v3.6.10, v3.6.10rc1, v3.6.11, v3.6.11rc1, v3.6.12, v3.6.9, v3.6.9rc1; v3.7.4, v3.7.4rc1, v3.7.4rc2, v3.7.5, v3.7.5rc1, v3.7.6, v3.7.6rc1, v3.7.7, v3.7.7rc1, v3.7.8, v3.7.8rc1, v3.7.9."}]},"problemtype":{"problemtype_data":[{"description":[{"lang":"eng","value":"n/a"}]}]},"references":{"reference_data":[{"refsource":"BID","name":"107466","url":"http://www.securityfocus.com/bid/107466"},{"refsource":"FEDORA","name":"FEDORA-2019-1ffd6b6064","url":"https://lists.fedoraproject.org/archives/list/package-announce@lists.fedoraproject.org/message/JXASHCDD4PQFKTMKQN4YOP5ZH366ABN4/"},{"refsource":"REDHAT","name":"RHSA-2019:1260","url":"https://access.redhat.com/errata/RHSA-2019:1260"},{"refsource":"FEDORA","name":"FEDORA-2019-ec26883852","url":"https://lists.fedoraproject.org/archives/list/package-announce@lists.fedoraproject.org/message/JMWSKTNOHSUOT3L25QFJAVCFYZX46FYK/"},{"refsource":"MLIST","name":"[debian-lts-announce] 20190625 [SECURITY] [DLA 1834-1] python2.7 security update","url":"https://lists.debian.org/debian-lts-announce/2019/06/msg00022.html"},{"refsource":"MLIST","name":"[debian-lts-announce] 20190625 [SECURITY] [DLA 1835-1] python3.4 security update","url":"https://lists.debian.org/debian-lts-announce/2019/06/msg00023.html"},{"refsource":"MLIST","name":"[debian-lts-announce] 20190625 [SECURITY] [DLA 1835-2] python3.4 regression update","url":"https://lists.debian.org/debian-lts-announce/2019/06/msg00026.html"},{"refsource":"FEDORA","name":"FEDORA-2019-7723d4774a","url":"https://lists.fedoraproject.org/archives/list/package-announce@lists.fedoraproject.org/message/44TS66GJMO5H3RLMVZEBGEFTB6O2LJJU/"},{"refsource":"FEDORA","name":"FEDORA-2019-7df59302e0","url":"https://lists.fedoraproject.org/archives/list/package-announce@lists.fedoraproject.org/message/2ORNTF62QPLMJXIQ7KTZQ2776LMIXEKL/"},{"refsource":"REDHAT","name":"RHSA-2019:2030","url":"https://access.redhat.com/errata/RHSA-2019:2030"},{"refsource":"UBUNTU","name":"USN-4127-2","url":"https://usn.ubuntu.com/4127-2/"},{"refsource":"SUSE","name":"openSUSE-SU-2019:2131","url":"http://lists.opensuse.org/opensuse-security-announce/2019-09/msg00039.html"},{"refsource":"SUSE","name":"openSUSE-SU-2019:2133","url":"http://lists.opensuse.org/opensuse-security-announce/2019-09/msg00041.html"},{"refsource":"UBUNTU","name":"USN-4127-1","url":"https://usn.ubuntu.com/4127-1/"},{"refsource":"BUGTRAQ","name":"20191021 [slackware-security] python (SSA:2019-293-01)","url":"https://seclists.org/bugtraq/2019/Oct/29"},{"refsource":"REDHAT","name":"RHSA-2019:3335","url":"https://access.redhat.com/errata/RHSA-2019:3335"},{"refsource":"REDHAT","name":"RHSA-2019:3520","url":"https://access.redhat.com/errata/RHSA-2019:3520"},{"refsource":"REDHAT","name":"RHSA-2019:3725","url":"https://access.redhat.com/errata/RHSA-2019:3725"},{"refsource":"FEDORA","name":"FEDORA-2019-b06ec6159b","url":"https://lists.fedoraproject.org/archives/list/package-announce@lists.fedoraproject.org/message/M34WOYCDKTDE5KLUACE2YIEH7D37KHRX/"},{"refsource":"FEDORA","name":"FEDORA-2019-d202cda4f8","url":"https://lists.fedoraproject.org/archives/list/package-announce@lists.fedoraproject.org/message/JCPGLTTOBB3QEARDX4JOYURP6ELNNA2V/"},{"refsource":"FEDORA","name":"FEDORA-2019-57462fa10d","url":"https://lists.fedoraproject.org/archives/list/package-announce@lists.fedoraproject.org/message/4X3HW5JRZ7GCPSR7UHJOLD7AWLTQCDVR/"},{"refsource":"GENTOO","name":"GLSA-202003-26","url":"https://security.gentoo.org/glsa/202003-26"},{"refsource":"MLIST","name":"[debian-lts-announce] 20200715 [SECURITY] [DLA 2280-1] python3.5 security update","url":"https://lists.debian.org/debian-lts-announce/2020/07/msg00011.html"},{"refsource":"MLIST","name":"[debian-lts-announce] 20200822 [SECURITY] [DLA 2337-1] python2.7 security update","url":"https://lists.debian.org/debian-lts-announce/2020/08/msg00034.html"},{"refsource":"MISC","name":"http://packetstormsecurity.com/files/154927/Slackware-Security-Advisory-python-Updates.html","url":"http://packetstormsecurity.com/files/154927/Slackware-Security-Advisory-python-Updates.html"},{"refsource":"MLIST","name":"[oss-security] 20210204 [CVE-2020-15693, CVE-2020-15694] Nim - stdlib Httpclient - Header Crlf Injection & Server Response Validation","url":"http://www.openwall.com/lists/oss-security/2021/02/04/2"},{"url":"https://www.oracle.com/security-alerts/cpujul2022.html","refsource":"MISC","name":"https://www.oracle.com/security-alerts/cpujul2022.html"},{"name":"https://bugs.python.org/issue36276","refsource":"MISC","url":"https://bugs.python.org/issue36276"},{"refsource":"CONFIRM","name":"https://security.netapp.com/advisory/ntap-20190619-0005/","url":"https://security.netapp.com/advisory/ntap-20190619-0005/"}]}},"nvd":{"publishedDate":"2019-03-13 03:29:00","lastModifiedDate":"2023-11-07 03:13:00","problem_types":["CWE-93"],"metrics":{"baseMetricV3":{"cvssV3":{"version":"3.1","vectorString":"CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:C/C:L/I:L/A:N","attackVector":"NETWORK","attackComplexity":"LOW","privilegesRequired":"NONE","userInteraction":"REQUIRED","scope":"CHANGED","confidentialityImpact":"LOW","integrityImpact":"LOW","availabilityImpact":"NONE","baseScore":6.1,"baseSeverity":"MEDIUM"},"exploitabilityScore":2.8,"impactScore":2.7},"baseMetricV2":{"cvssV2":{"version":"2.0","vectorString":"AV:N/AC:M/Au:N/C:N/I:P/A:N","accessVector":"NETWORK","accessComplexity":"MEDIUM","authentication":"NONE","confidentialityImpact":"NONE","integrityImpact":"PARTIAL","availabilityImpact":"NONE","baseScore":4.3},"severity":"MEDIUM","exploitabilityScore":8.6,"impactScore":2.9,"acInsufInfo":false,"obtainAllPrivilege":false,"obtainUserPrivilege":false,"obtainOtherPrivilege":false,"userInteractionRequired":true}},"configurations":{"CVE_data_version":"4.0","nodes":[{"operator":"OR","children":[],"cpe_match":[{"vulnerable":true,"cpe23Uri":"cpe:2.3:a:python:python:*:*:*:*:*:*:*:*","versionStartIncluding":"3.6.0","versionEndExcluding":"3.6.9","cpe_name":[]},{"vulnerable":true,"cpe23Uri":"cpe:2.3:a:python:python:*:*:*:*:*:*:*:*","versionStartIncluding":"3.7.0","versionEndExcluding":"3.7.4","cpe_name":[]},{"vulnerable":true,"cpe23Uri":"cpe:2.3:a:python:python:*:*:*:*:*:*:*:*","versionStartIncluding":"3.5.0","versionEndExcluding":"3.5.8","cpe_name":[]},{"vulnerable":true,"cpe23Uri":"cpe:2.3:a:python:python:*:*:*:*:*:*:*:*","versionStartIncluding":"2.0","versionEndExcluding":"2.7.17","cpe_name":[]}]}]}},"legacy_mitre":{"record":{"CveYear":"2019","CveId":"9740","Ordinal":"147617","Title":"CVE-2019-9740","CVE":"CVE-2019-9740","Year":"2019"},"notes":[{"CveYear":"2019","CveId":"9740","Ordinal":"1","NoteData":"An issue was discovered in urllib2 in Python 2.x through 2.7.16 and urllib in Python 3.x through 3.7.3. CRLF injection is possible if the attacker controls a url parameter, as demonstrated by the first argument to urllib.request.urlopen with \\r\\n (specifically in the query string after a ? character) followed by an HTTP header or a Redis command. This is fixed in: v2.7.17, v2.7.17rc1, v2.7.18, v2.7.18rc1; v3.5.10, v3.5.10rc1, v3.5.8, v3.5.8rc1, v3.5.8rc2, v3.5.9; v3.6.10, v3.6.10rc1, v3.6.11, v3.6.11rc1, v3.6.12, v3.6.9, v3.6.9rc1; v3.7.4, v3.7.4rc1, v3.7.4rc2, v3.7.5, v3.7.5rc1, v3.7.6, v3.7.6rc1, v3.7.7, v3.7.7rc1, v3.7.8, v3.7.8rc1, v3.7.9.","Type":"Description","Title":null},{"CveYear":"2019","CveId":"9740","Ordinal":"2","NoteData":"2019-03-12","Type":"Other","Title":"Published"},{"CveYear":"2019","CveId":"9740","Ordinal":"3","NoteData":"2021-02-04","Type":"Other","Title":"Modified"}]}}}