Medium
Security advisory
In Go before 1.13.13 and 1.14.x before 1.14.5, Certificate.Verify may lack a check on the VerifyOptions.KeyUsages EKU requirements (if VerifyOptions.Roots equals nil and the installation is on Windows). Thus, X.509 certificate verification is incomplete.
- Products
- Not specified
- Affected versions
- Not specified
- Fixed versions
- Not specified
- CVEs
- CVE-2020-14039
- Confirmed fixed CVEs
- Not specified
- Updated in this feed
- 1 Nov 2026, 05:34 UTC · Revision 1
Source evidence
In Go before 1.13.13 and 1.14.x before 1.14.5, Certificate.Verify may lack a check on the VerifyOptions.KeyUsages EKU requirements (if VerifyOptions.Roots equals nil and the installation is on Windows). Thus, X.509 certificate verification is incomplete.
osv:CVE-2020-14039
Complete source record
{
"id": "1ed1c4238a930c36a186e0b8acf6fb0a336e6d47d84d76b82d2ff0371b77fa53",
"url": "https://osv.dev/vulnerability/CVE-2020-14039",
"method": "structured",
"payload": {
"kind": "advisory",
"title": "CVE-2020-14039",
"summary": "In Go before 1.13.13 and 1.14.x before 1.14.5, Certificate.Verify may lack a check on the VerifyOptions.KeyUsages EKU requirements (if VerifyOptions.Roots equals nil and the installation is on Windows). Thus, X.509 certificate verification is incomplete.",
"evidence": "osv:CVE-2020-14039",
"products": [],
"severity": "medium",
"structured": {
"id": "CVE-2020-14039",
"aliases": [
"BIT-golang-2020-14039",
"CVE-2020-14039",
"GO-2021-0223"
],
"metrics": [
{
"type": "CVSS_V3",
"score": "CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:L/A:N"
}
],
"affected": [
{
"ranges": [
{
"repo": "https://github.com/golang/go",
"type": "GIT",
"events": [
{
"introduced": "0"
},
{
"fixed": "1f8859c22ccdeb969b252c8139bf4b1aae5c4909"
},
{
"fixed": "36fcde1676a0d3863cb5f295eed6938cd782fcbb"
}
],
"database_specific": {
"extracted_events": [
{
"cpe": "cpe:2.3:a:golang:go:*:*:*:*:*:*:*:*",
"range": [
{
"introduced": "0"
},
{
"fixed": "1.13.13"
}
],
"source": "CPE_RANGE"
},
{
"cpe": "cpe:2.3:a:golang:go:*:*:*:*:*:*:*:*",
"range": [
{
"introduced": "1.14.0"
},
{
"fixed": "1.14.5"
}
],
"source": "CPE_RANGE"
}
]
}
}
],
"versions": [
"go1.14.4",
"go1.13.12",
"go1.13.11",
"go1.14.3",
"go1.13.10",
"go1.14.2",
"go1.13.9",
"go1.14.1",
"go1.13.8",
"go1.14",
"go1.14rc1",
"go1.13.6",
"go1.14beta1",
"go1.13.5",
"go1.13.4",
"go1.13.3",
"go1.13",
"go1.13rc2",
"go1.13rc1",
"go1.13beta1",
"go1.12beta2",
"go1.12beta1",
"go1.11beta3",
"go1.11beta2",
"go1.11beta1",
"go1.10rc2",
"go1.10rc1",
"go1.10beta2",
"go1.10beta1",
"go1.9beta2",
"go1.9beta1",
"go1.8beta2",
"go1.8beta1",
"go1.7rc4",
"go1.7rc3",
"go1.7rc2",
"go1.7rc1",
"go1.7beta2",
"go1.7beta1",
"go1.6beta2",
"go1.6beta1",
"go1.5beta3",
"go1.5beta2",
"go1.5beta1",
"go1.4beta1",
"go1.3beta2",
"go1.3beta1",
"weekly.2012-03-27",
"weekly",
"weekly.2012-03-22",
"weekly.2012-03-13",
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"weekly.2012-02-22",
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"weekly.2011-12-06",
"weekly.2011-12-02",
"weekly.2011-12-01",
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"weekly.2011-07-19",
"weekly.2011-06-09",
"weekly.2011-06-23",
"weekly.2011-06-16",
"weekly.2011-06-02",
"weekly.2011-05-22",
"weekly.2011-04-27",
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"weekly.2011-03-28",
"weekly.2011-03-15",
"weekly.2011-03-07.1",
"release.r56",
"weekly.2011-03-07",
"weekly.2011-02-24",
"weekly.2011-02-15",
"weekly.2011-02-01.1",
"weekly.2011-02-01",
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"weekly.2011-01-19",
"weekly.2011-01-12",
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"weekly.2010-12-15",
"weekly.2010-12-08",
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"weekly.2010-10-27",
"weekly.2010-10-20",
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"weekly.2010-10-13",
"weekly.2010-09-29",
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"weekly.2010-07-01",
"weekly.2010-06-21",
"weekly.2010-06-09",
"weekly.2010-05-27",
"weekly.2010-05-04",
"weekly.2010-04-27",
"weekly.2010-04-13",
"weekly.2010-03-30",
"weekly.2010-03-22",
"weekly.2010-03-15",
"weekly.2010-03-04",
"weekly.2010-02-23",
"weekly.2010-02-17",
"weekly.2010-02-04",
"weekly.2010-01-27",
"weekly.2010-01-13",
"weekly.2010-01-05",
"weekly.2009-12-22",
"weekly.2009-12-09",
"weekly.2009-12-07",
"weekly.2009-11-17",
"weekly.2009-11-12",
"weekly.2009-11-10.1",
"weekly.2009-11-10",
"weekly.2009-11-06"
],
"database_specific": {
"source": "https://storage.googleapis.com/cve-osv-conversion/osv-output/CVE-2020-14039.json"
}
}
],
"modified": "2026-10-24T10:30:30.540177205Z",
"provider": "osv",
"references": [
"https://groups.google.com/forum/#%21forum/golang-announce",
"https://groups.google.com/forum/#%21topic/golang-announce/XZNfaiwgt2w",
"https://security.netapp.com/advisory/ntap-20200731-0005/",
"https://www.oracle.com/security-alerts/cpuApr2021.html"
],
"provider_metadata": {
"unresolved_ranges": [
{
"cpes": [
"cpe:2.3:o:opensuse:leap:15.1:*:*:*:*:*:*:*",
"cpe:2.3:o:opensuse:leap:15.2:*:*:*:*:*:*:*"
],
"vendor_product": "opensuse:leap",
"extracted_events": [
{
"range": [
{
"introduced": "15.1"
},
{
"last_affected": "15.1"
},
{
"introduced": "15.2"
},
{
"last_affected": "15.2"
}
],
"source": "CPE_STRING"
}
]
}
]
}
},
"related_cves": [
{
"value": "CVE-2020-14039",
"evidence": "/id"
}
],
"security_relevant": true,
"severity_evidence": "/severity/0/score"
},
"source_id": "core-osv",
"document_id": 432592,
"published_at": "2020-07-17T16:15:11.327+00:00"
}