A security regression of CVE-2019-9636 was discovered in python since commit d537ab0ff9767ef024f26246899728f0116b1ec3 affecting versions…

Description

A security regression of CVE-2019-9636 was discovered in python since commit d537ab0ff9767ef024f26246899728f0116b1ec3 affecting versions 2.7, 3.5, 3.6, 3.7 and from v3.8.0a4 through v3.8.0b1, which still allows an attacker to exploit CVE-2019-9636 by abusing the user and password parts of a URL. When an application parses user-supplied URLs to store cookies, authentication credentials, or other kind of information, it is possible for an attacker to provide specially crafted URLs to make the application locate host-related information (e.g. cookies, authentication data) and send them to a different host than where it should, unlike if the URLs had been correctly parsed. The result of an attack may vary based on the application.

Scores

EPSS (exploitation in 30 days)

5.2% · top 7.5% of all CVEs (4 Nov 2026)

CISA SSVC

Exploitation: none · Automatable: no · Technical impact: partial

The list uses the assigner's score when there is one, then CISA's, then NVD's: Critical 9.8.

Weakness

• CWE-172 (opens in a new tab)All about CWE-172 and its CVEs
• CWE-522 (opens in a new tab)All about CWE-522 and its CVEs

Affected products

• Python · python

  • affected affects 2.7, 3.5, 3.6, 3.7, >= v3.8.0a4 and < v3.8.0b1

References (29)

• https://python-security.readthedocs.io/vuln/urlsplit-nfkc-normalization2.html (opens in a new tab)x_refsource_MISCx_transferred
• https://bugzilla.redhat.com/show_bug.cgi?id=CVE-2019-10160 (opens in a new tab)x_refsource_CONFIRMx_transferred
• https://github.com/python/cpython/commit/8d0ef0b5edeae52960c7ed05ae8a12388324f87e (opens in a new tab)x_refsource_CONFIRMx_transferred
• https://github.com/python/cpython/commit/f61599b050c621386a3fc6bc480359e2d3bb93de (opens in a new tab)x_refsource_CONFIRMx_transferred
• https://github.com/python/cpython/commit/250b62acc59921d399f0db47db3b462cd6037e09 (opens in a new tab)x_refsource_CONFIRMx_transferred
• https://github.com/python/cpython/commit/fd1771dbdd28709716bd531580c40ae5ed814468 (opens in a new tab)x_refsource_CONFIRMx_transferred
• https://security.netapp.com/advisory/ntap-20190617-0003/ (opens in a new tab)x_refsource_CONFIRMx_transferred
• RHSA-2019:1587 (opens in a new tab)vendor-advisoryx_refsource_REDHATx_transferred
• [debian-lts-announce] 20190625 [SECURITY] [DLA 1834-1] python2.7 security update (opens in a new tab)mailing-listx_refsource_MLISTx_transferred
• RHSA-2019:1700 (opens in a new tab)vendor-advisoryx_refsource_REDHATx_transferred
• FEDORA-2019-7723d4774a (opens in a new tab)vendor-advisoryx_refsource_FEDORAx_transferred
• FEDORA-2019-7df59302e0 (opens in a new tab)vendor-advisoryx_refsource_FEDORAx_transferred
• FEDORA-2019-9bfb4a3e4b (opens in a new tab)vendor-advisoryx_refsource_FEDORAx_transferred
• FEDORA-2019-60a1defcd1 (opens in a new tab)vendor-advisoryx_refsource_FEDORAx_transferred
• RHSA-2019:2437 (opens in a new tab)vendor-advisoryx_refsource_REDHATx_transferred
• openSUSE-SU-2019:1906 (opens in a new tab)vendor-advisoryx_refsource_SUSEx_transferred
• USN-4127-2 (opens in a new tab)vendor-advisoryx_refsource_UBUNTUx_transferred
• USN-4127-1 (opens in a new tab)vendor-advisoryx_refsource_UBUNTUx_transferred
• FEDORA-2019-50772cf122 (opens in a new tab)vendor-advisoryx_refsource_FEDORAx_transferred
• FEDORA-2019-5dc275c9f2 (opens in a new tab)vendor-advisoryx_refsource_FEDORAx_transferred
• FEDORA-2019-2b1f72899a (opens in a new tab)vendor-advisoryx_refsource_FEDORAx_transferred
• FEDORA-2019-b06ec6159b (opens in a new tab)vendor-advisoryx_refsource_FEDORAx_transferred
• FEDORA-2019-d202cda4f8 (opens in a new tab)vendor-advisoryx_refsource_FEDORAx_transferred
• FEDORA-2019-57462fa10d (opens in a new tab)vendor-advisoryx_refsource_FEDORAx_transferred
• openSUSE-SU-2020:0086 (opens in a new tab)vendor-advisoryx_refsource_SUSEx_transferred
• [debian-lts-announce] 20200715 [SECURITY] [DLA 2280-1] python3.5 security update (opens in a new tab)mailing-listx_refsource_MLISTx_transferred
• [bookkeeper-issues] 20200729 [GitHub] [bookkeeper] padma81 opened a new issue #2387: Security vulnerabilities in the apache/bookkeeper-4.9.2 image (opens in a new tab)mailing-listx_refsource_MLISTx_transferred
• [debian-lts-announce] 20200822 [SECURITY] [DLA 2337-1] python2.7 security update (opens in a new tab)mailing-listx_refsource_MLISTx_transferred
• https://cert-portal.siemens.com/productcert/html/ssa-398330.html (opens in a new tab)

Sources

The same CVE in the primary databases and aggregators, to check against.

• CVE.org record (opens in a new tab)
• CVE List JSON (GitHub) (opens in a new tab)
• NVD (opens in a new tab)
• FIRST EPSS (opens in a new tab)
• OSV.dev (opens in a new tab)
• GitHub Advisories (opens in a new tab)
• CIRCL Vulnerability-Lookup (opens in a new tab)

Badge for a README or a ticket

[![CVE-2019-10160](https://trackcve.app/badge/CVE-2019-10160.svg)](https://trackcve.app/cve/CVE-2019-10160)

Record last updated 14 Oct 2026, 06:49 UTC.