Medium
Security advisory
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.
- Products
- Not specified
- Affected versions
- Not specified
- Fixed versions
- Not specified
- CVEs
- CVE-2020-14422
- Confirmed fixed CVEs
- Not specified
- Updated in this feed
- 31 Oct 2026, 10:51 UTC · Revision 1
Source evidence
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.
osv:CVE-2020-14422
Complete source record
{
"id": "d97ab800dd9a4e666bbe627905a6511d82c438991a1d980c47ef125fa147e9f8",
"url": "https://osv.dev/vulnerability/CVE-2020-14422",
"method": "structured",
"payload": {
"kind": "advisory",
"title": "CVE-2020-14422",
"summary": "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.",
"evidence": "osv:CVE-2020-14422",
"products": [],
"severity": "medium",
"structured": {
"id": "CVE-2020-14422",
"aliases": [
"BIT-libpython-2020-14422",
"BIT-python-2020-14422",
"BIT-python-min-2020-14422",
"CVE-2020-14422",
"PSF-2020-3"
],
"metrics": [
{
"type": "CVSS_V3",
"score": "CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:N/I:N/A:H"
}
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"affected": [
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],
"database_specific": {
"source": "https://storage.googleapis.com/cve-osv-conversion/osv-output/CVE-2020-14422.json"
}
}
],
"modified": "2026-10-20T10:51:50.289600174Z",
"provider": "osv",
"references": [
"https://cert-portal.siemens.com/productcert/html/ssa-398330.html",
"https://lists.debian.org/debian-lts-announce/2023/05/msg00016.html",
"https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/36XI3EEQNMHGOZEI63Y7UV6XZRELYEAU/",
"https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/CNHPQGSP2YM3JAUD2VAMPXTIUQTZ2M2U/",
"https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/CTUNTBJ3POHONQOTLEZC46POCIYYTAKZ/",
"https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/FCCZTAYZATTNSNEAXWA7U3HCO2OVQKT5/",
"https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/LE4O3PNDNNOMSKHNUKZKD3NGHIFUFDPX/",
"https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/NTBKKOLFFNHG6CM4ACDX4APHSD5ZX5N4/",
"https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/OXI72HIHMXCQFWTULUXDG7VDA2BCYL4Y/",
"https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/V3TALOUBYU2MQD4BPLRTDQUMBKGCAXUA/",
"https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/V53P2YOLEQH4J7S5QHXMKMZYFTVVMTMO/",
"https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/VT4AF72TJ2XNIKCR4WEBR7URBJJ4YZRD/",
"https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/X36Y523UAZY5QFXZAAORNFY63HLBWX7N/",
"https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/YILCHHTNLH4GG4GSQBX2MZRKZBXOLCKE/",
"https://bugs.python.org/issue41004",
"https://lists.debian.org/debian-lts-announce/2020/07/msg00011.html",
"https://security.gentoo.org/glsa/202008-01",
"https://security.netapp.com/advisory/ntap-20200724-0004/",
"https://usn.ubuntu.com/4428-1/",
"https://www.oracle.com/security-alerts/cpujan2021.html",
"https://github.com/python/cpython/pull/20956"
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"related_cves": [
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"value": "CVE-2020-14422",
"evidence": "/id"
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},
"source_id": "core-osv",
"document_id": 383023,
"published_at": "2020-06-18T14:15:11.047+00:00"
}