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Vulnerability record · CVE-2020-14422 · published 18 June 2020

CVE-2020-14422: Python vulnerability

Python · Python

Lib/ipaddress.py in Python through 3.8.3 improperly computes hash values in the IPv4Interface and IPv6Interface classes, which might allow a remote attacker to cause a denial of service if an application is affected by the performance of a dictionary containing IPv4Interface or IPv6Interface objects, and this attacker can cause many dictionary entries to be created. This is fixed in: v3.5.10, v3.5.10rc1; v3.6.12; v3.7.9; v3.8.4, v3.8.4rc1, v3.8.5, v3.8.6, v3.8.6rc1; v3.9.0, v3.9.0b4, v3.9.0b5, v3.9.0rc1, v3.9.0rc2.

5.9 CVSS 3.1 Medium EPSS 13% · top 3.9% CWE-330 · CWE-330CWE-682 · CWE-682
5.9CVSS 3.1 base score, v2 4.3
13%EPSS exploitation probability, 30 days
NoNot in CISA KEV
4Affected product versions listed by NVD
48References
17 Jun 2026Last modified by NVD

Description

Lib/ipaddress.py in Python through 3.8.3 improperly computes hash values in the IPv4Interface and IPv6Interface classes, which might allow a remote attacker to cause a denial of service if an application is affected by the performance of a dictionary containing IPv4Interface or IPv6Interface objects, and this attacker can cause many dictionary entries to be created. This is fixed in: v3.5.10, v3.5.10rc1; v3.6.12; v3.7.9; v3.8.4, v3.8.4rc1, v3.8.5, v3.8.6, v3.8.6rc1; v3.9.0, v3.9.0b4, v3.9.0b5, v3.9.0rc1, v3.9.0rc2.

CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:N/I:N/A:H

Affected products

4 vulnerable configurations from NVD's CPE data, grouped by vendor and product.

References

LinkTags
http://lists.opensuse.org/opensuse-security-announce/2020-07/msg00003.html Mailing ListThird Party Advisory
http://lists.opensuse.org/opensuse-security-announce/2020-07/msg00006.html Mailing ListThird Party Advisory
http://lists.opensuse.org/opensuse-security-announce/2020-07/msg00032.html Mailing ListThird Party Advisory
http://lists.opensuse.org/opensuse-security-announce/2020-07/msg00041.html Mailing ListThird Party Advisory
https://bugs.python.org/issue41004 Vendor Advisory
https://github.com/python/cpython/pull/20956 Issue TrackingThird Party Advisory
https://lists.debian.org/debian-lts-announce/2020/07/msg00011.html Third Party Advisory
https://lists.debian.org/debian-lts-announce/2023/05/msg00016.html
https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/36XI3EEQNMHGOZEI63Y7UV6
https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/CNHPQGSP2YM3JAUD2VAMPXT
https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/CTUNTBJ3POHONQOTLEZC46P
https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/FCCZTAYZATTNSNEAXWA7U3H
https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/LE4O3PNDNNOMSKHNUKZKD3N
https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/NTBKKOLFFNHG6CM4ACDX4AP
https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/OXI72HIHMXCQFWTULUXDG7V
https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/V3TALOUBYU2MQD4BPLRTDQU
https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/V53P2YOLEQH4J7S5QHXMKMZ
https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/VT4AF72TJ2XNIKCR4WEBR7U
https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/X36Y523UAZY5QFXZAAORNFY
https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/YILCHHTNLH4GG4GSQBX2MZR
https://security.gentoo.org/glsa/202008-01 Third Party Advisory
https://security.netapp.com/advisory/ntap-20200724-0004/ Third Party Advisory
https://usn.ubuntu.com/4428-1/ Third Party Advisory
https://www.oracle.com/security-alerts/cpujan2021.html Third Party Advisory
http://lists.opensuse.org/opensuse-security-announce/2020-07/msg00003.html Mailing ListThird Party Advisory
http://lists.opensuse.org/opensuse-security-announce/2020-07/msg00006.html Mailing ListThird Party Advisory
http://lists.opensuse.org/opensuse-security-announce/2020-07/msg00032.html Mailing ListThird Party Advisory
http://lists.opensuse.org/opensuse-security-announce/2020-07/msg00041.html Mailing ListThird Party Advisory
https://bugs.python.org/issue41004 Vendor Advisory
https://github.com/python/cpython/pull/20956 Issue TrackingThird Party Advisory
https://lists.debian.org/debian-lts-announce/2020/07/msg00011.html Third Party Advisory
https://lists.debian.org/debian-lts-announce/2023/05/msg00016.html
https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/36XI3EEQNMHGOZEI63Y7UV6
https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/CNHPQGSP2YM3JAUD2VAMPXT
https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/CTUNTBJ3POHONQOTLEZC46P
https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/FCCZTAYZATTNSNEAXWA7U3H
https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/LE4O3PNDNNOMSKHNUKZKD3N
https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/NTBKKOLFFNHG6CM4ACDX4AP
https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/OXI72HIHMXCQFWTULUXDG7V
https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/V3TALOUBYU2MQD4BPLRTDQU

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Source: NIST National Vulnerability Database (record CVE-2020-14422), CISA KEV, FIRST EPSS (scores of 2026-09-26). This page is refreshed as NVD updates the record.