# CVE-2019-10160

## Summary

- **CVE ID:** CVE-2019-10160
- **Severity:** CRITICAL
- **CVSS Score:** 9.8 (CVSS:3.0/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H)
- **CWE:** CWE-172
- **Published:** Jun 7, 2019
- **Last Modified:** Mar 14, 2026

## 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.

## Affected Products

- Python — python (affects 2.7, 3.5, 3.6, 3.7, >= v3.8.0a4 and < v3.8.0b1)

## References

- [CNA](https://python-security.readthedocs.io/vuln/urlsplit-nfkc-normalization2.html)
- [CNA](https://bugzilla.redhat.com/show_bug.cgi?id=CVE-2019-10160)
- [CNA](https://github.com/python/cpython/commit/8d0ef0b5edeae52960c7ed05ae8a12388324f87e)
- [CNA](https://github.com/python/cpython/commit/f61599b050c621386a3fc6bc480359e2d3bb93de)
- [CNA](https://github.com/python/cpython/commit/250b62acc59921d399f0db47db3b462cd6037e09)
- [CNA](https://github.com/python/cpython/commit/fd1771dbdd28709716bd531580c40ae5ed814468)
- [CNA](https://security.netapp.com/advisory/ntap-20190617-0003/)
- [CNA](https://access.redhat.com/errata/RHSA-2019:1587)
- [CNA](https://lists.debian.org/debian-lts-announce/2019/06/msg00022.html)
- [CNA](https://access.redhat.com/errata/RHSA-2019:1700)
- [CNA](https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/44TS66GJMO5H3RLMVZEBGEFTB6O2LJJU/)
- [CNA](https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/2ORNTF62QPLMJXIQ7KTZQ2776LMIXEKL/)
- [CNA](https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/KRYFIMISZ47NTAU3XWZUOFB7CYL62KES/)
- [CNA](https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/HQEQLXLOCR3SNM3AA5RRYJFQ5AZBYJ4L/)
- [CNA](https://access.redhat.com/errata/RHSA-2019:2437)
- [CNA](http://lists.opensuse.org/opensuse-security-announce/2019-08/msg00042.html)
- [CNA](https://usn.ubuntu.com/4127-2/)
- [CNA](https://usn.ubuntu.com/4127-1/)
- [CNA](https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/NF3DRDGMVIRYNZMSLJIHNW47HOUQYXVG/)
- [CNA](https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/ER6LONC2B2WYIO56GBQUDU6QTWZDPUNQ/)
- [CNA](https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/E2HP37NUVLQSBW3J735A2DQDOZ4ZGBLY/)
- [CNA](https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/M34WOYCDKTDE5KLUACE2YIEH7D37KHRX/)
- [CNA](https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/JCPGLTTOBB3QEARDX4JOYURP6ELNNA2V/)
- [CNA](https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/4X3HW5JRZ7GCPSR7UHJOLD7AWLTQCDVR/)
- [CNA](http://lists.opensuse.org/opensuse-security-announce/2020-01/msg00040.html)
- [CNA](https://lists.debian.org/debian-lts-announce/2020/07/msg00011.html)
- [CNA](https://lists.apache.org/thread.html/r1b103833cb5bc8466e24ff0ecc5e75b45a705334ab6a444e64e840a0%40%3Cissues.bookkeeper.apache.org%3E)
- [CNA](https://lists.debian.org/debian-lts-announce/2020/08/msg00034.html)

## Exploitation Prediction (EPSS)

- **EPSS Score:** 1.80%
- **EPSS Percentile:** 82.5

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_Exported from OnDuty AI Vulnerability Intelligence on 2026-09-10._