CVE-2020-14422

MEDIUMNVD 5.95.9—
EchelonGraph scoreMEDIUM confidence

Score 5.9 from GitHub Security Advisory published 2021-05-11. NVD baseline CVSS 5.9; sources differ by 0.0.

Triggered by: GitHub Security Advisory CVSS
Sources: epss, ghsa, nvd
Trending — 4 sources updated this weekElevated
5.9EG
EchelonGraph verdictMonitorLow exploitation likelihood right now — keep watching.
  • Lower severity and no public exploit yet
CISA-KEV: Not listedEPSS PROB: 13%CVSS: 5.9Exploit: Elevated riskExposed services: Not assessed

A fix is available — apply it.

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 v3
5.9
EG Score
5.9MEDIUMmedium confidence
EG Risk
58
EG Risk 58/100CISA SSVC

EG Risk is EchelonGraph's 0–100 priority score: it fuses intrinsic severity with real-world exploitation and automatability so you can rank equal-severity CVEs and fix the most dangerous first. Higher = act sooner. Distinct from the 0–10 EG Score (severity).

How it’s computed
Severity59% × 45%
Exploitation40% × 40%
Automatability100% × 15%
CISA SSVC: Track at low or medium mission impact; Attend at high (mission-essential systems).
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

CISA SSVCTrack 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). Mission impact is CISA's Mission & Well-being decision point, and only you can judge it: high means the affected system is essential to your organisation's mission, or its compromise could cause irreversible harm to people. CISA's decision table

Published

June 18, 2020

Last Modified

October 8, 2026

Advisory Details (6)

Auto-updated Oct 9, 2026
Patch available. Sources: github_pr.
generic

[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/
generic

[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/
genericMentions a patch (unverified)

[SECURITY] [DLA 3424-1] python-ipaddress security update

https://lists.debian.org/debian-lts-announce/2023/05/msg00016.html
genericMentions a patch (unverified)

[SECURITY] [DLA 2280-1] python3.5 security update

https://lists.debian.org/debian-lts-announce/2020/07/msg00011.html
github_pr

bpo-41004: IPv4Interface, and IPv6Interface hash collisions

Upstream fix in progress (PR #20956 · python/cpython, state=closed)

https://github.com/python/cpython/pull/20956
generic

Issue 41004: [CVE-2020-14422] Hash collisions in IPv4Interface and IPv6Interface - Python tracker

https://bugs.python.org/issue41004

Vendor 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.

Patch Availability(7)

Vendor / EcosystemFix (by version range) / PatchReleasedSource
ubuntupython3.5-venv (3.5.2-2ubuntu0~16.04.11) @ xenial2026-10-08ubuntu
ubuntupython3.5-venv (3.5.2-2ubuntu0~16.04.13+esm13) @ xenial2026-10-08ubuntu
redhatpython3-0:3.6.8-18.el72020-11-10redhat
redhatpython3-0:3.6.8-31.el82020-11-04redhat
redhatpython38:3.8-8030020200818121840.4190259b2020-11-04redhat
redhatrh-python38-python-urllib3-0:1.25.7-6.el72020-10-20redhat
redhatrh-python36-python-virtualenv-0:15.1.0-3.el72020-10-19redhat

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)
PackageVulnerable rangeFix by version rangeDependents
python3—
  • every version up to 3.7.7-r1: fixed in 3.7.7-r1
—
Alpine:v3.11(1)
PackageVulnerable rangeFix by version rangeDependents
python3—
  • every version up to 3.8.2-r1: fixed in 3.8.2-r1
—
Alpine:v3.12(1)
PackageVulnerable rangeFix by version rangeDependents
python3—
  • every version up to 3.8.4-r0: fixed in 3.8.4-r0
—
Alpine:v3.13(1)
PackageVulnerable rangeFix by version rangeDependents
python3—
  • every version up to 3.8.4-r0: fixed in 3.8.4-r0
—
Alpine:v3.14(1)
PackageVulnerable rangeFix by version rangeDependents
python3—
  • every version up to 3.8.4-r0: fixed in 3.8.4-r0
—
Alpine:v3.15(1)
PackageVulnerable rangeFix by version rangeDependents
python3—
  • every version up to 3.8.4-r0: fixed in 3.8.4-r0
—
Alpine:v3.16(1)
PackageVulnerable rangeFix by version rangeDependents
python3—
  • every version up to 3.8.4-r0: fixed in 3.8.4-r0
—
Alpine:v3.17(1)
PackageVulnerable rangeFix by version rangeDependents
python3—
  • every version up to 3.8.4-r0: fixed in 3.8.4-r0
—
Alpine:v3.18(1)
PackageVulnerable rangeFix by version rangeDependents
python3—
  • every version up to 3.8.4-r0: fixed in 3.8.4-r0
—
Alpine:v3.19(1)
PackageVulnerable rangeFix by version rangeDependents
python3—
  • every version up to 3.8.4-r0: fixed in 3.8.4-r0
—
Alpine:v3.20(1)
PackageVulnerable rangeFix by version rangeDependents
python3—
  • every version up to 3.8.4-r0: fixed in 3.8.4-r0
—
Alpine:v3.21(1)
PackageVulnerable rangeFix by version rangeDependents
python3—
  • every version up to 3.8.4-r0: fixed in 3.8.4-r0
—
Alpine:v3.22(1)
PackageVulnerable rangeFix by version rangeDependents
python3—
  • every version up to 3.8.4-r0: fixed in 3.8.4-r0
—
Alpine:v3.23(1)
PackageVulnerable rangeFix by version rangeDependents
python3—
  • every version up to 3.8.4-r0: fixed in 3.8.4-r0
—
Alpine:v3.24(1)
PackageVulnerable rangeFix by version rangeDependents
python3—
  • every version up to 3.8.4-r0: fixed in 3.8.4-r0
—
Alpine:v3.9(1)
PackageVulnerable rangeFix by version rangeDependents
python3—
  • every version up to 3.6.9-r3: fixed in 3.6.9-r3
—
Debian:10(1)
PackageVulnerable rangeFix by version rangeDependents
python-ipaddress1.0.17-1
  • every version up to 1.0.17-1+deb10u1: fixed in 1.0.17-1+deb10u1
—
Debian:11(1)
PackageVulnerable rangeFix by version rangeDependents
python-ipaddress1.0.23-1, 1.0.23-2
  • every version on: no fix on record
—
Debian:9(1)
PackageVulnerable rangeFix by version rangeDependents
python3.53.5.3-1, 3.5.3-1+deb9u1
  • every version up to 3.5.3-1+deb9u2: fixed in 3.5.3-1+deb9u2
—

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 9× in last 7d / 28× in last 30d)

Each row is a source pipeline that fetched or updated this CVE on that date, with what changed. 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. Most recent first.

Showing the most recent 100 of 166 total refreshes for this CVE.

  1. 2026-10-09 20:03 UTCEPSS rescore
  2. 2026-10-08 21:25 UTCEG score recompute
  3. 2026-10-08 21:25 UTCVendor advisory
  4. 2026-10-08 21:25 UTCGHSA enrichment
  5. 2026-10-08 16:38 UTCEPSS rescore
  6. 2026-10-07 23:43 UTCEPSS rescore
  7. 2026-10-06 15:13 UTCEPSS rescore
  8. 2026-10-05 17:39 UTCEPSS rescore
  9. 2026-10-03 14:22 UTCEPSS rescore
  10. 2026-09-30 15:11 UTCEG score recompute
  11. 2026-09-30 14:59 UTCEPSS rescore
  12. 2026-09-27 13:40 UTCEPSS rescore
  13. 2026-09-26 22:12 UTCOSV refresh
  14. 2026-09-26 15:54 UTCEPSS rescore
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  16. 2026-09-24 13:59 UTCEPSS rescore
  17. 2026-09-22 14:43 UTCEPSS rescore
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  24. 2026-09-16 14:04 UTCEPSS rescore
  25. 2026-09-15 03:06 UTCEPSS rescore
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  1. 2026-09-12 14:56 UTCEPSS rescore
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  3. 2026-09-11 09:32 UTCEPSS rescore
  4. 2026-09-07 15:57 UTCEPSS rescore
  5. 2026-09-07 08:18 UTCOSV refresh
  6. 2026-09-06 13:44 UTCEPSS rescore
  7. 2026-09-05 15:24 UTCEPSS rescore
  8. 2026-09-04 13:56 UTCEPSS rescore
  9. 2026-09-04 05:03 UTCEPSS rescore
  10. 2026-09-02 14:08 UTCEPSS rescore
  11. 2026-09-01 03:32 UTCEPSS rescore
  12. 2026-08-30 19:14 UTCEPSS rescore
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  14. 2026-08-28 21:37 UTCEPSS rescore
  15. 2026-08-27 14:21 UTCEPSS rescore
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  17. 2026-08-25 13:45 UTCEPSS rescore
  18. 2026-08-20 22:51 UTCEPSS rescore
  19. 2026-08-20 18:01 UTCOSV refresh
  20. 2026-08-19 17:00 UTCEPSS rescore
  21. 2026-08-18 13:44 UTCEPSS rescore
  22. 2026-08-17 13:43 UTCEPSS rescore
  23. 2026-08-16 14:52 UTCEPSS rescore
  24. 2026-08-16 02:11 UTCEPSS rescore
  25. 2026-08-15 01:26 UTCEPSS rescore
  26. 2026-08-13 21:57 UTCEPSS rescore
  27. 2026-08-12 13:47 UTCEPSS rescore
  28. 2026-08-09 13:43 UTCEPSS rescore
  29. 2026-08-08 16:33 UTCEPSS rescore
  30. 2026-08-07 16:23 UTCEPSS rescore
  31. 2026-08-06 13:43 UTCEPSS rescore
  32. 2026-08-05 19:14 UTCEPSS rescore
  33. 2026-08-05 11:41 UTCOSV refresh
  34. 2026-08-04 15:06 UTCEPSS rescore
  35. 2026-08-03 10:32 UTCEPSS rescore
  36. 2026-08-02 02:23 UTCEPSS rescore
  37. 2026-08-01 04:12 UTCEPSS rescore
  38. 2026-07-30 16:24 UTCEPSS rescore
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  40. 2026-07-28 15:32 UTCEPSS rescore
  41. 2026-07-26 14:51 UTCEPSS rescore
  42. 2026-07-25 14:14 UTCEPSS rescore
  43. 2026-07-24 14:14 UTCEPSS rescore
  44. 2026-07-23 14:15 UTCEPSS rescore
  45. 2026-07-23 14:15 UTCEPSS rescore
  46. 2026-07-23 01:49 UTCEG score recompute
  47. 2026-07-22 22:34 UTCEG score recompute
  48. 2026-07-22 14:05 UTCEPSS rescore
  49. 2026-07-21 15:22 UTCEPSS rescore
  50. 2026-07-21 15:22 UTCEPSS rescore
  51. 2026-07-20 17:04 UTCEPSS rescore
  52. 2026-07-19 14:28 UTCEPSS rescore
  53. 2026-07-19 14:28 UTCEPSS rescore
  54. 2026-07-19 10:52 UTCOSV refresh
  55. 2026-07-19 02:26 UTCEPSS rescore
  56. 2026-07-19 02:26 UTCEPSS rescore
  57. 2026-07-18 10:02 UTCEPSS rescore
  58. 2026-07-16 16:59 UTCEPSS rescore
  59. 2026-07-16 16:59 UTCEPSS rescore
  60. 2026-07-15 16:55 UTCEPSS rescore
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  65. 2026-07-08 15:11 UTCEPSS rescore
  66. 2026-07-07 13:43 UTCEPSS rescore
  67. 2026-07-06 16:25 UTCEPSS rescore
  68. 2026-07-06 16:25 UTCEPSS rescore
  69. 2026-07-05 02:27 UTCEPSS rescore
  70. 2026-07-04 06:28 UTCEPSS rescore
  71. 2026-07-01 17:31 UTCOSV refresh
  72. 2026-07-01 15:03 UTCEPSS rescore
  73. 2026-07-01 15:03 UTCEPSS rescore
  74. 2026-06-30 23:20 UTCEPSS rescore
  75. 2026-06-30 23:20 UTCEPSS rescore

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Frequently asked(5)

What is CVE-2020-14422?
CVE-2020-14422 is a medium vulnerability published on June 18, 2020. 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…
When was CVE-2020-14422 disclosed?
CVE-2020-14422 was first published on June 18, 2020, with the most recent update on October 8, 2026. EchelonGraph re-ingests CVE updates from NVD on a 2-hour cycle, so this page reflects the latest published state.
Is CVE-2020-14422 actively exploited?
CVE-2020-14422 is not currently on CISA's Known Exploited Vulnerabilities catalog. FIRST EPSS estimates a 13% probability of exploitation in the next 30 days (96th percentile of EPSS-scored CVEs).
What is the CVSS score of CVE-2020-14422?
CVE-2020-14422 has a CVSS v3 base score of 5.9 (NVD).
How do I remediate CVE-2020-14422?
A fix for CVE-2020-14422 is available: update to the fixed version the vendor names in its advisory. The vendor advisories EchelonGraph has for CVE-2020-14422 are linked in the Vendor Advisories panel on this page.

Dependency Blast Radius

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