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.
CVE-2020-14422
“—” beside the score: it is equal to NVD's CVSS score.
Score 5.9 from GitHub Security Advisory published 2021-05-11. NVD baseline CVSS 5.9; sources differ by 0.0.
Also known asEUVD-2020-6561 (ENISA EUVD) · GHSA-9gg6-cm3f-wf38 (GitHub Security Advisories)Source: ENISA EUVD
- Lower severity and no public exploit yet
A fix is available — apply it.
- CVSS v3
- 5.9
- EG Score
- 5.9MEDIUMmedium confidence
- EG Risk
- 58EG Risk 58/100
EG Risk is EchelonGraph's 0–100 priority score. It fuses impact severity (EG Severity, the CVSS base score, never the KEV-floored or EPSS-lifted EG Score) with real-world exploitation and automatability, under weights EchelonGraph set by hand, so you can rank equal-severity CVEs and fix the most dangerous first. Higher = act sooner.
How it’s computed (value × EchelonGraph’s weight)Severity59% × 45%Impact severity (EG Severity): CVSS 5.9 of 10. Never the KEV-floored or EPSS-lifted EG Score.Exploitation40% × 40%EchelonGraph's fixed weight for EG-KEV Tier 3 (Elevated): a constant, not a probability.Automatability100% × 15%CISA's SSVC Automatable value: yes (Vulnrichment).SSVC (CISA's decision table, applied by EchelonGraph): Track at low or medium mission impact; Attend at high (mission-essential systems).Exploitation none (CISA Vulnrichment) · Automatable yes (CISA Vulnrichment) · Technical impact partial (CISA Vulnrichment). All three are CISA's SSVC values (Vulnrichment). EchelonGraph applied CISA's decision table to them; CISA publishes SSVC inputs and the table, not a decision for each CVE.Action: A fix is available. Apply it within your standard update timelines at low or medium mission impact and sooner than that at high. - EPSS PROB
- 13%
- EPSS %ILE
- 96th
- KEV
- Not listed
What the EG score is made of (scorer v4.0: the three questions the 0–10 score mixes, published apart · methodology)
The EG score (5.9): severity, escalated by confirmed exploitation. This CVE's 5.9 is its impact severity (EG Severity), not escalated.
- EG Severity
- 5.9 MEDIUMCVSS-B, impact only: no KEV listing, EPSS or EG-KEV tier raises it.GitHub Security Advisory CVSS
- EG Likelihood
- 13% within 30 daysSource: FIRST EPSS (model v2026.06.15, score date 2026-10-25). FIRST's exploitation probability, not an EchelonGraph model.
- Confirmed exploitation
- None on record (CISA KEV, EG-KEV Tier 1)Reported apart from the likelihood: an observed fact, not a probability.
- EG Priority
- SSVC Track at medium mission impactTrack at low or medium mission impact; Attend at high (mission-essential systems).CISA BOD 26-04: 14 days if the affected system is publicly exposed; 60 days if it is not.Each input and its source, and whom BOD 26-04 binds: the SSVC and BOD 26-04 blocks below.
SSVC (CISA's decision table, applied by EchelonGraph)Track at low or medium mission impact; Attend at high (mission-essential systems).
A fix is available. Apply it within your standard update timelines at low or medium mission impact and sooner than that at high.
Exploitation none (CISA Vulnrichment) · Automatable yes (CISA Vulnrichment) · Technical impact partial (CISA Vulnrichment). All three are CISA's SSVC values (Vulnrichment). EchelonGraph applied CISA's decision table to them; CISA publishes SSVC inputs and the table, not a decision for each CVE. Mission impact is CISA's Mission & Well-being decision point, and only you can judge it. CISA's table makes it high when Mission Prevalence is Essential — the vulnerable component "directly provides capabilities that constitute at least one MEF for at least one entity" (MEF: mission essential function) — or when Public Well-Being Impact is Irreversible: "multiple fatalities are likely", the cyber-physical system "is likely lost or destroyed", "extreme or serious externalities" are imposed on other parties, or social systems such as elections or the financial grid "are destabilized and potentially collapse". CISA's decision table
BOD 26-04 (CISA's remediation timeline, Table 1)14 days if the affected system is publicly exposed; 60 days if it is not.
The score's inputs: In CISA KEV no (CISA's KEV catalog) · Automatable yes (CISA Vulnrichment) · Technical impact partial (CISA Vulnrichment). Whether your system is publicly exposed is yours to answer. BOD 26-04 binds US Federal Civilian Executive Branch agencies; for anyone else it is CISA's published timeline, a reference rather than an obligation. The directive · how EchelonGraph applies it
Published
June 18, 2020
Last Modified
October 14, 2026
Advisory Details (6)
Auto-updated Oct 9, 2026[SECURITY] Fedora 31 Update: python36-3.6.11-3.fc31 - package-announce - Fedora mailing-lists
https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/CNHPQGSP2YM3JAUD2VAMPXTIUQTZ2M2U/[SECURITY] Fedora 31 Update: python35-3.5.9-9.fc31 - package-announce - Fedora mailing-lists
https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/36XI3EEQNMHGOZEI63Y7UV6XZRELYEAU/[SECURITY] [DLA 3424-1] python-ipaddress security update
https://lists.debian.org/debian-lts-announce/2023/05/msg00016.html[SECURITY] [DLA 2280-1] python3.5 security update
https://lists.debian.org/debian-lts-announce/2020/07/msg00011.htmlbpo-41004: IPv4Interface, and IPv6Interface hash collisions
Upstream fix in progress (PR #20956 · python/cpython, state=closed)
https://github.com/python/cpython/pull/20956Issue 41004: [CVE-2020-14422] Hash collisions in IPv4Interface and IPv6Interface - Python tracker
https://bugs.python.org/issue41004Vendor Advisories for CVE-2020-14422(6)
These vendors published their own advisory mentioning this CVE — often with vendor-specific remediation steps + affected product lists not in NVD.
- GHSA-9gg6-cm3f-wf38GitHub Security AdvisoriesMedium
Incorrect Calculation and Use of Insufficiently Random Values in Python
- CVE-2020-14422Microsoft Security Response Center (MSRC)
CVE-2020-14422
- RHSA-2020:4641Red Hat Product SecurityMedium
Red Hat Security Advisory: python38:3.8 security, bug fix, and enhancement update
- RHSA-2020:4433Red Hat Product SecurityMedium
Red Hat Security Advisory: python3 security and bug fix update
- RHSA-2020:4299Red Hat Product SecurityMedium
Red Hat Security Advisory: rh-python38 security, bug fix, and enhancement update
- RHSA-2020:4285Red Hat Product SecurityMedium
Red Hat Security Advisory: rh-python36 security, bug fix, and enhancement update
Patch Availability(7)
| Vendor / Ecosystem | Fix (by version range) / Patch | Released | Source |
|---|---|---|---|
| ubuntu | python3.5-venv (3.5.2-2ubuntu0~16.04.11) @ xenial | 2026-10-08 | ubuntu |
| ubuntu | python3.5-venv (3.5.2-2ubuntu0~16.04.13+esm13) @ xenial | 2026-10-08 | ubuntu |
| redhat | python3-0:3.6.8-18.el7 | 2020-11-10 | redhat |
| redhat | python3-0:3.6.8-31.el8 | 2020-11-04 | redhat |
| redhat | python38:3.8-8030020200818121840.4190259b | 2020-11-04 | redhat |
| redhat | rh-python38-python-urllib3-0:1.25.7-6.el7 | 2020-10-20 | redhat |
| redhat | rh-python36-python-virtualenv-0:15.1.0-3.el7 | 2020-10-19 | redhat |
Patches are aggregated from vendor advisories (Red Hat, Microsoft, Cisco, GitHub) and package ecosystems (OSV, GHSA). Multiple rows for the same upstream release have been deduplicated.
Affected Packages
(19 across 19 ecosystems)
Alpine:v3.10(1)
| Package | Vulnerable range | Fix by version range | Dependents |
|---|---|---|---|
| python3 | — |
| — |
Alpine:v3.11(1)
| Package | Vulnerable range | Fix by version range | Dependents |
|---|---|---|---|
| python3 | — |
| — |
Alpine:v3.12(1)
| Package | Vulnerable range | Fix by version range | Dependents |
|---|---|---|---|
| python3 | — |
| — |
Alpine:v3.13(1)
| Package | Vulnerable range | Fix by version range | Dependents |
|---|---|---|---|
| python3 | — |
| — |
Alpine:v3.14(1)
| Package | Vulnerable range | Fix by version range | Dependents |
|---|---|---|---|
| python3 | — |
| — |
Alpine:v3.15(1)
| Package | Vulnerable range | Fix by version range | Dependents |
|---|---|---|---|
| python3 | — |
| — |
Alpine:v3.16(1)
| Package | Vulnerable range | Fix by version range | Dependents |
|---|---|---|---|
| python3 | — |
| — |
Alpine:v3.17(1)
| Package | Vulnerable range | Fix by version range | Dependents |
|---|---|---|---|
| python3 | — |
| — |
Alpine:v3.18(1)
| Package | Vulnerable range | Fix by version range | Dependents |
|---|---|---|---|
| python3 | — |
| — |
Alpine:v3.19(1)
| Package | Vulnerable range | Fix by version range | Dependents |
|---|---|---|---|
| python3 | — |
| — |
Alpine:v3.20(1)
| Package | Vulnerable range | Fix by version range | Dependents |
|---|---|---|---|
| python3 | — |
| — |
Alpine:v3.21(1)
| Package | Vulnerable range | Fix by version range | Dependents |
|---|---|---|---|
| python3 | — |
| — |
Alpine:v3.22(1)
| Package | Vulnerable range | Fix by version range | Dependents |
|---|---|---|---|
| python3 | — |
| — |
Alpine:v3.23(1)
| Package | Vulnerable range | Fix by version range | Dependents |
|---|---|---|---|
| python3 | — |
| — |
Alpine:v3.24(1)
| Package | Vulnerable range | Fix by version range | Dependents |
|---|---|---|---|
| python3 | — |
| — |
Alpine:v3.9(1)
| Package | Vulnerable range | Fix by version range | Dependents |
|---|---|---|---|
| python3 | — |
| — |
Debian:10(1)
| Package | Vulnerable range | Fix by version range | Dependents |
|---|---|---|---|
| python-ipaddress | 1.0.17-1 |
| — |
Debian:11(1)
| Package | Vulnerable range | Fix by version range | Dependents |
|---|---|---|---|
| python-ipaddress | 1.0.23-1, 1.0.23-2 |
| — |
Debian:9(1)
| Package | Vulnerable range | Fix by version range | Dependents |
|---|---|---|---|
| python3.5 | 3.5.3-1, 3.5.3-1+deb9u1 |
| — |
Weakness Classification(2)
MITRE Common Weakness Enumeration — the root-cause categories this CVE belongs to.
Additional Vendor Advisories
(3)
Vendors that published advisories for this CVE beyond the curated set above. Broader coverage but minimal per-row detail — click through for the original advisory.
Data Freshness Timeline
(refreshed 7× in last 7d / 41× in last 30d)
Each row is a time one of our pipelines fetched, updated or re-scored this CVE. For example, "NVD update" means NVD published or revised its analysis for this CVE; "MITRE cvelistV5" means we ingested or refreshed it from the CNA feed. An arrow marks a change the record states ("CVSS v3 → 9.1"); EPSS and GHSA rows show the values recorded at that time, not what changed (EPSS values are rounded; hover one for the exact figures). Most recent first.
Showing the most recent 99 of 197 refreshes on record for this CVE.
A repeat, a row identical to one the same pipeline wrote less than 10 seconds earlier, is not a separate refresh and is not counted. 1 repeat row among the latest 100 is merged into the row it repeats. The 98 oldest rows on record are not shown and were not checked, so the counts can still include repeats.
- 2026-10-31 16:28 UTCEPSS rescoreEPSS 13% · 96th percentile
- 2026-10-30 16:29 UTCEPSS rescoreEPSS 13% · 96th percentile
- 2026-10-29 16:28 UTCEPSS rescoreEPSS 13% · 96th percentile
- 2026-10-28 16:27 UTCEPSS rescoreEPSS 13% · 96th percentile
- 2026-10-27 16:27 UTCEPSS rescoreEPSS 13% · 96th percentile
- 2026-10-27 12:25 UTCOSV refresh
- 2026-10-26 16:27 UTCEPSS rescoreEPSS 13% · 96th percentile
- 2026-10-25 18:50 UTCEG score recompute
- 2026-10-25 16:28 UTCEPSS rescoreEPSS 13% · 96th percentile
- 2026-10-24 16:28 UTCEPSS rescoreEPSS 13% · 96th percentile
- 2026-10-23 16:27 UTCEPSS rescoreEPSS 13% · 96th percentile
- 2026-10-22 16:28 UTCEPSS rescoreEPSS 13% · 96th percentile
- 2026-10-21 16:28 UTCEPSS rescoreEPSS 13% · 96th percentile
- 2026-10-20 16:28 UTCEPSS rescoreEPSS 13% · 96th percentile
- 2026-10-19 16:27 UTCEPSS rescoreEPSS 13% · 96th percentile
- 2026-10-18 16:28 UTCEPSS rescoreEPSS 13% · 96th percentile
- 2026-10-18 09:34 UTCEG score recompute
- 2026-10-17 16:28 UTCEPSS rescoreEPSS 13% · 96th percentile
- 2026-10-16 16:32 UTCEPSS rescoreEPSS 13% · 96th percentile
- 2026-10-15 16:27 UTCEPSS rescoreEPSS 13% · 96th percentile
- 2026-10-14 16:28 UTCEPSS rescoreEPSS 13% · 96th percentile
- 2026-10-14 10:28 UTCVendor advisory
- 2026-10-14 10:28 UTCGHSA enrichmentGHSA-9gg6-cm3f-wf38 · GitHub CVSS 5.9
- 2026-10-14 09:43 UTCEG score recompute
- 2026-10-14 09:43 UTCVendor advisory
Show 74 moreShow fewer
- 2026-10-14 09:43 UTCGHSA enrichmentGHSA-9gg6-cm3f-wf38 · GitHub CVSS 5.9
- 2026-10-13 16:28 UTCEPSS rescoreEPSS 13% · 96th percentile
- 2026-10-12 19:46 UTCEG score recompute
- 2026-10-12 16:29 UTCEPSS rescoreEPSS 13% · 96th percentile
- 2026-10-12 00:09 UTCEG score recompute
- 2026-10-11 13:42 UTCEPSS rescoreEPSS 13% · 96th percentile
- 2026-10-10 19:56 UTCEPSS rescoreEPSS 13% · 96th percentile
- 2026-10-09 20:03 UTCEPSS rescoreEPSS 13% · 96th percentile
- 2026-10-08 21:25 UTCEG score recompute
- 2026-10-08 21:25 UTCVendor advisory
- 2026-10-08 21:25 UTCGHSA enrichmentGHSA-9gg6-cm3f-wf38 · GitHub CVSS 5.9
- 2026-10-08 16:38 UTCEPSS rescoreEPSS 13% · 96th percentile
- 2026-10-07 23:43 UTCEPSS rescoreEPSS 13% · 96th percentile
- 2026-10-06 15:13 UTCEPSS rescoreEPSS 13% · 96th percentile
- 2026-10-05 17:39 UTCEPSS rescoreEPSS 13% · 96th percentile
- 2026-10-03 14:22 UTCEPSS rescoreEPSS 13% · 96th percentile
- 2026-09-30 15:11 UTCEG score recompute
- 2026-09-30 14:59 UTCEPSS rescoreEPSS 13% · 96th percentile
- 2026-09-27 13:40 UTCEPSS rescoreEPSS 13% · 96th percentile
- 2026-09-26 22:12 UTCOSV refresh
- 2026-09-26 15:54 UTCEPSS rescoreEPSS 13% · 96th percentile
- 2026-09-26 00:20 UTCEPSS rescoreEPSS 13% · 96th percentile
- 2026-09-24 13:59 UTCEPSS rescoreEPSS 13% · 96th percentile
- 2026-09-22 14:43 UTCEPSS rescoreEPSS 13% · 96th percentile
- 2026-09-21 20:28 UTCEPSS rescoreEPSS 13% · 96th percentile
- 2026-09-20 20:11 UTCEPSS rescoreEPSS 13% · 96th percentile
- 2026-09-19 15:37 UTCEPSS rescoreEPSS 13% · 96th percentile
- 2026-09-18 19:23 UTCEPSS rescoreEPSS 13% · 96th percentile
- 2026-09-17 19:22 UTCEPSS rescoreEPSS 13% · 96th percentile
- 2026-09-16 14:04 UTCEPSS rescoreEPSS 13% · 96th percentile
- 2026-09-15 03:06 UTCEPSS rescoreEPSS 13% · 96th percentile
- 2026-09-12 14:56 UTCEPSS rescoreEPSS 13% · 96th percentile
- 2026-09-11 14:48 UTCEPSS rescoreEPSS 13% · 96th percentile
- 2026-09-11 09:32 UTCEPSS rescoreEPSS 13% · 96th percentile
- 2026-09-07 15:57 UTCEPSS rescoreEPSS 13% · 95th percentile
- 2026-09-07 08:18 UTCOSV refresh
- 2026-09-06 13:44 UTCEPSS rescoreEPSS 13% · 95th percentile
- 2026-09-05 15:24 UTCEPSS rescoreEPSS 13% · 96th percentile
- 2026-09-04 13:56 UTCEPSS rescoreEPSS 13% · 95th percentile
- 2026-09-04 05:03 UTCEPSS rescoreEPSS 13% · 95th percentile
- 2026-09-02 14:08 UTCEPSS rescoreEPSS 13% · 95th percentile
- 2026-09-01 03:32 UTCEPSS rescoreEPSS 13% · 95th percentile
- 2026-08-30 19:14 UTCEPSS rescoreEPSS 13% · 95th percentile
- 2026-08-30 01:18 UTCEPSS rescoreEPSS 13% · 96th percentile
- 2026-08-28 21:37 UTCEPSS rescoreEPSS 13% · 96th percentile
- 2026-08-27 14:21 UTCEPSS rescoreEPSS 13% · 95th percentile
- 2026-08-26 14:42 UTCEPSS rescoreEPSS 13% · 95th percentile
- 2026-08-25 13:45 UTCEPSS rescoreEPSS 13% · 95th percentile
- 2026-08-20 22:51 UTCEPSS rescoreEPSS 13% · 95th percentile
- 2026-08-20 18:01 UTCOSV refresh
- 2026-08-19 17:00 UTCEPSS rescoreEPSS 13% · 95th percentile
- 2026-08-18 13:44 UTCEPSS rescoreEPSS 13% · 95th percentile
- 2026-08-17 13:43 UTCEPSS rescoreEPSS 13% · 95th percentile
- 2026-08-16 14:52 UTCEPSS rescoreEPSS 13% · 95th percentile
- 2026-08-16 02:11 UTCEPSS rescoreEPSS 13% · 95th percentile
- 2026-08-15 01:26 UTCEPSS rescoreEPSS 13% · 95th percentile
- 2026-08-13 21:57 UTCEPSS rescoreEPSS 13% · 95th percentile
- 2026-08-12 13:47 UTCEPSS rescoreEPSS 13% · 95th percentile
- 2026-08-09 13:43 UTCEPSS rescoreEPSS 13% · 95th percentile
- 2026-08-08 16:33 UTCEPSS rescoreEPSS 13% · 95th percentile
- 2026-08-07 16:23 UTCEPSS rescoreEPSS 13% · 95th percentile
- 2026-08-06 13:43 UTCEPSS rescoreEPSS 13% · 95th percentile
- 2026-08-05 19:14 UTCEPSS rescoreEPSS 13% · 95th percentile
- 2026-08-05 11:41 UTCOSV refresh
- 2026-08-04 15:06 UTCEPSS rescoreEPSS 13% · 95th percentile
- 2026-08-03 10:32 UTCEPSS rescoreEPSS 13% · 95th percentile
- 2026-08-02 02:23 UTCEPSS rescoreEPSS 13% · 95th percentile
- 2026-08-01 04:12 UTCEPSS rescoreEPSS 13% · 95th percentile
- 2026-07-30 16:24 UTCEPSS rescoreEPSS 13% · 95th percentile
- 2026-07-30 01:27 UTCEPSS rescoreEPSS 12% · 95th percentile
- 2026-07-28 15:32 UTCEPSS rescoreEPSS 12% · 95th percentile
- 2026-07-26 14:51 UTCEPSS rescoreEPSS 12% · 95th percentile
- 2026-07-25 14:14 UTCEPSS rescoreEPSS 12% · 95th percentile
- 2026-07-24 14:14 UTCEPSS rescoreEPSS 12% · 95th percentile
Related CVEs(same product + same vendor + same CWE)
Same product
10 shownAlpine:v3.9:python3 · Alpine:v3.10:python3 · Alpine:v3.12:python3
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- CVE-2021-23336NVD 5.9EG 6.5EPSS p99MEDIUM
- CVE-2022-45061EG 7.5HIGH
- CVE-2021-3426EG 5.7MEDIUM
Same vendor
10 shownredhat:RHSA-2020:4285 · ubuntu:USN-4428-1 · ubuntu:USN-6891-1
- CVE-2019-20907EG 7.5HIGH
- CVE-2020-8492EG 6.5EPSS p94MEDIUM
- CVE-2020-26116EG 7.2EPSS p94HIGH
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- CVE-2019-9674EG 7.5EPSS p93HIGH
- CVE-2019-17514EG 7.5EPSS p92HIGH
- CVE-2019-18348EG 6.1MEDIUM
- CVE-2022-48565EG 9.8EPSS p93CRITICAL
- CVE-2015-20107NVD 7.6EG 9.8CRITICAL
- CVE-2021-29921EG 9.8EPSS p94CRITICAL
Same CWE
10 shownCWE-330 · CWE-682
Frequently asked(5)
What is CVE-2020-14422?
When was the CVE record for CVE-2020-14422 published?
Is CVE-2020-14422 actively exploited?
What is the CVSS score of CVE-2020-14422?
How do I remediate CVE-2020-14422?
Dependency Blast Radius
See which npm, PyPI, Go, and Maven packages are affected by CVE-2020-14422
Is Your Infrastructure Affected by CVE-2020-14422?
EchelonGraph automatically scans your cloud infrastructure and maps CVE exposure using blast radius analysis.