Python 2.7.x through 2.7.16 and 3.x through 3.7.2 is affected by: Improper Handling of Unicode Encoding (with an incorrect netloc) during NFKC normalization. The impact is: Information disclosure (credentials, cookies, etc. that are cached against a given hostname). The components are: urllib.parse.urlsplit, urllib.parse.urlparse. The attack vector is: A specially crafted URL could be incorrectly parsed to locate cookies or authentication data and send that information to a different host than when parsed correctly. This is fixed in: v2.7.17, v2.7.17rc1, v2.7.18, v2.7.18rc1; v3.5.10, v3.5.10rc1, v3.5.7, 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; v3.7.3, v3.7.3rc1, 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.
Fix
Patch, vendor advisory and mitigation references on NVD 6
- https://bugs.python.org/issue36216 Issue Tracking, Patch, Vendor Advisory
- https://github.com/python/cpython/pull/12201 Patch, Third Party Advisory
- https://python-security.readthedocs.io/vuln/urlsplit-nfkc-normalization.html Patch, Third Party Advisory
- https://bugs.python.org/issue36216 Issue Tracking, Patch, Vendor Advisory
- https://github.com/python/cpython/pull/12201 Patch, Third Party Advisory
- https://python-security.readthedocs.io/vuln/urlsplit-nfkc-normalization.html Patch, Third Party Advisory
Every line above is quoted from NVD, CISA, Microsoft, the vendor's own advisory or DISA; nothing is generated.
Change history 1
- First seenCVSS 9.8 · python, fedoraproject, opensuseNVD modified 2026-10-14 07:16
Affected (CPE criteria) 36
cpe:2.3:a:python:python:*:*:*:*:*:*:*:*cpe:2.3:o:fedoraproject:fedora:28:*:*:*:*:*:*:*cpe:2.3:o:fedoraproject:fedora:29:*:*:*:*:*:*:*cpe:2.3:o:fedoraproject:fedora:30:*:*:*:*:*:*:*cpe:2.3:o:fedoraproject:fedora:31:*:*:*:*:*:*:*cpe:2.3:o:opensuse:leap:15.0:*:*:*:*:*:*:*cpe:2.3:o:opensuse:leap:15.1:*:*:*:*:*:*:*cpe:2.3:o:opensuse:leap:42.3:*:*:*:*:*:*:*cpe:2.3:o:debian:debian_linux:8.0:*:*:*:*:*:*:*cpe:2.3:o:debian:debian_linux:9.0:*:*:*:*:*:*:*cpe:2.3:o:canonical:ubuntu_linux:12.04:*:*:*:-:*:*:*cpe:2.3:o:canonical:ubuntu_linux:14.04:*:*:*:esm:*:*:*cpe:2.3:o:canonical:ubuntu_linux:16.04:*:*:*:esm:*:*:*cpe:2.3:o:canonical:ubuntu_linux:18.04:*:*:*:lts:*:*:*cpe:2.3:o:canonical:ubuntu_linux:19.04:*:*:*:*:*:*:*cpe:2.3:a:redhat:openshift_container_platform:3.11:*:*:*:*:*:*:*cpe:2.3:o:redhat:enterprise_linux:7.5:*:*:*:*:*:*:*cpe:2.3:o:redhat:enterprise_linux:8.0:*:*:*:*:*:*:*cpe:2.3:o:redhat:enterprise_linux_desktop:6.0:*:*:*:*:*:*:*cpe:2.3:o:redhat:enterprise_linux_eus:7.5:*:*:*:*:*:*:*cpe:2.3:o:redhat:enterprise_linux_eus:8.1:*:*:*:*:*:*:*cpe:2.3:o:redhat:enterprise_linux_eus:8.2:*:*:*:*:*:*:*cpe:2.3:o:redhat:enterprise_linux_eus:8.4:*:*:*:*:*:*:*cpe:2.3:o:redhat:enterprise_linux_eus:8.6:*:*:*:*:*:*:*cpe:2.3:o:redhat:enterprise_linux_server:6.0:*:*:*:*:*:*:*cpe:2.3:o:redhat:enterprise_linux_server_aus:7.4:*:*:*:*:*:*:*cpe:2.3:o:redhat:enterprise_linux_server_aus:8.2:*:*:*:*:*:*:*cpe:2.3:o:redhat:enterprise_linux_server_aus:8.4:*:*:*:*:*:*:*cpe:2.3:o:redhat:enterprise_linux_server_eus:5.6:*:*:*:*:*:*:*cpe:2.3:o:redhat:enterprise_linux_server_tus:7.4:*:*:*:*:*:*:*cpe:2.3:o:redhat:enterprise_linux_server_tus:8.2:*:*:*:*:*:*:*cpe:2.3:o:redhat:enterprise_linux_server_tus:8.4:*:*:*:*:*:*:*cpe:2.3:o:redhat:enterprise_linux_server_tus:8.6:*:*:*:*:*:*:*cpe:2.3:o:redhat:enterprise_linux_workstation:6.0:*:*:*:*:*:*:*cpe:2.3:a:redhat:virtualization:4.0:*:*:*:*:*:*:*cpe:2.3:a:oracle:sun_zfs_storage_appliance_kit:8.8.6:*:*:*:*:*:*:*
References 105
- http://lists.opensuse.org/opensuse-security-announce/2019-04/msg00092.html Mailing List, Third Party Advisory
- http://lists.opensuse.org/opensuse-security-announce/2019-04/msg00097.html Mailing List, Third Party Advisory
- http://lists.opensuse.org/opensuse-security-announce/2019-05/msg00024.html Mailing List, Third Party Advisory
- http://lists.opensuse.org/opensuse-security-announce/2019-06/msg00050.html Mailing List, Third Party Advisory
- http://lists.opensuse.org/opensuse-security-announce/2019-08/msg00042.html Mailing List, Third Party Advisory
- http://lists.opensuse.org/opensuse-security-announce/2020-01/msg00040.html Mailing List, Third Party Advisory
- http://www.securityfocus.com/bid/107400 Third Party Advisory, VDB Entry
- https://access.redhat.com/errata/RHBA-2019:0763 Third Party Advisory
- https://access.redhat.com/errata/RHBA-2019:0764 Third Party Advisory
- https://access.redhat.com/errata/RHBA-2019:0959 Third Party Advisory
- https://access.redhat.com/errata/RHSA-2019:0710 Third Party Advisory
- https://access.redhat.com/errata/RHSA-2019:0765 Third Party Advisory
- https://access.redhat.com/errata/RHSA-2019:0806 Third Party Advisory
- https://access.redhat.com/errata/RHSA-2019:0902 Third Party Advisory
- https://access.redhat.com/errata/RHSA-2019:0981 Third Party Advisory
- https://access.redhat.com/errata/RHSA-2019:0997 Third Party Advisory
- https://access.redhat.com/errata/RHSA-2019:1467 Third Party Advisory
- https://access.redhat.com/errata/RHSA-2019:2980 Third Party Advisory
- https://access.redhat.com/errata/RHSA-2019:3170 Third Party Advisory
- https://bugs.python.org/issue36216 Issue Tracking, Patch, Vendor Advisory
- https://github.com/python/cpython/pull/12201 Patch, Third Party Advisory
- https://lists.debian.org/debian-lts-announce/2019/06/msg00022.html Mailing List, Third Party Advisory
- https://lists.debian.org/debian-lts-announce/2019/06/msg00023.html Mailing List, Third Party Advisory
- https://lists.debian.org/debian-lts-announce/2020/07/msg00011.html Mailing List, Third Party Advisory
- https://lists.debian.org/debian-lts-announce/2020/08/msg00034.html Mailing List, Third Party Advisory
- https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/2ORNTF62QPLMJXIQ7KTZQ2776LMIXEKL/
- https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/44TS66GJMO5H3RLMVZEBGEFTB6O2LJJU/
- https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/46PVWY5LFP4BRPG3BVQ5QEEFYBVEXHCK/
- https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/4X3HW5JRZ7GCPSR7UHJOLD7AWLTQCDVR/
- https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/AEZ5IQT7OF7Q2NCGIVABOWYGKO7YU3NJ/
- https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/CFBAAGM27H73OLYBUA2IAZFSUN6KGLME/
- https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/D3LXPABKVLFYUHRYJPM3CSS5MS6FXKS7/
- https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/E2HP37NUVLQSBW3J735A2DQDOZ4ZGBLY/
- https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/ER6LONC2B2WYIO56GBQUDU6QTWZDPUNQ/
- https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/HQEQLXLOCR3SNM3AA5RRYJFQ5AZBYJ4L/
- https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/ICBEGRHIPHWPG2VGYS6R4EVKVUUF4AQW/
- https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/IFAXBEY2TGOBDRKTR556JBXBVFSAKD6I/
- https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/JCPGLTTOBB3QEARDX4JOYURP6ELNNA2V/
- https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/JMWSKTNOHSUOT3L25QFJAVCFYZX46FYK/
- https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/JSKPGPZQNTAULHW4UH63KGOOUIDE4RRB/
- https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/JXASHCDD4PQFKTMKQN4YOP5ZH366ABN4/
- https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/KRYFIMISZ47NTAU3XWZUOFB7CYL62KES/
- https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/L25RTMKCF62DLC2XVSNXGX7C7HXISLVM/
- https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/M34WOYCDKTDE5KLUACE2YIEH7D37KHRX/
- https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/TR6GCO3WTV4D5L23WTCBF275VE6BVNI3/
- https://python-security.readthedocs.io/vuln/urlsplit-nfkc-normalization.html Patch, Third Party Advisory
- https://security.gentoo.org/glsa/202003-26 Third Party Advisory
- https://security.netapp.com/advisory/ntap-20190517-0001/ Third Party Advisory
- https://usn.ubuntu.com/4127-1/ Third Party Advisory
- https://usn.ubuntu.com/4127-2/ Third Party Advisory
- https://www.oracle.com/security-alerts/cpujan2020.html Third Party Advisory
- https://www.oracle.com/security-alerts/cpujul2022.html
- http://lists.opensuse.org/opensuse-security-announce/2019-04/msg00092.html Mailing List, Third Party Advisory
- http://lists.opensuse.org/opensuse-security-announce/2019-04/msg00097.html Mailing List, Third Party Advisory
- http://lists.opensuse.org/opensuse-security-announce/2019-05/msg00024.html Mailing List, Third Party Advisory
- http://lists.opensuse.org/opensuse-security-announce/2019-06/msg00050.html Mailing List, Third Party Advisory
- http://lists.opensuse.org/opensuse-security-announce/2019-08/msg00042.html Mailing List, Third Party Advisory
- http://lists.opensuse.org/opensuse-security-announce/2020-01/msg00040.html Mailing List, Third Party Advisory
- http://www.securityfocus.com/bid/107400 Third Party Advisory, VDB Entry
- https://access.redhat.com/errata/RHBA-2019:0763 Third Party Advisory