Medium
openvpn3-client — security advisory
Improper certificate validation in the OpenVPN 3 Core library version 3.4 through 3.11.7 allows attackers to circumvent extended key usage restrictions.
- Products
- openvpn3-client
- Affected versions
- 24.1+dfsg-1, 25+dfsg-1, 25+dfsg-2, 25+dfsg-3, 25+dfsg-4, 26+dfsg-1, 26+dfsg-2, 27+dfsg-1, 27.1+dfsg-1, 27.1+dfsg-2
- Fixed versions
- Not specified
- CVEs
- CVE-2026-106017
- Confirmed fixed CVEs
- Not specified
- Updated in this feed
- 1 Nov 2026, 09:54 UTC · Revision 1
Source evidence
Improper certificate validation in the OpenVPN 3 Core library version 3.4 through 3.11.7 allows attackers to circumvent extended key usage restrictions.
osv:DEBIAN-CVE-2026-106017
openvpn3-client
Fixed versions: Not specified
openvpn3-client
Fixed versions: Not specified
Complete source record
{
"id": "f9a9f4c3abea04474c2d3825d158373715777861f04616b7cbca9717d8cb7ba1",
"url": "https://osv.dev/vulnerability/DEBIAN-CVE-2026-106017",
"method": "structured",
"payload": {
"kind": "advisory",
"title": "DEBIAN-CVE-2026-106017",
"summary": "Improper certificate validation in the OpenVPN 3 Core library version 3.4 through 3.11.7 allows attackers to circumvent extended key usage restrictions.",
"evidence": "osv:DEBIAN-CVE-2026-106017",
"products": [
{
"name": {
"value": "openvpn3-client",
"evidence": "/affected/0/package/name"
},
"prerequisites": [],
"fixed_versions": [],
"affected_versions": [
{
"value": "24.1+dfsg-1",
"evidence": "/affected/0/versions"
},
{
"value": "25+dfsg-1",
"evidence": "/affected/0/versions"
},
{
"value": "25+dfsg-2",
"evidence": "/affected/0/versions"
},
{
"value": "25+dfsg-3",
"evidence": "/affected/0/versions"
},
{
"value": "25+dfsg-4",
"evidence": "/affected/0/versions"
},
{
"value": "26+dfsg-1",
"evidence": "/affected/0/versions"
},
{
"value": "26+dfsg-2",
"evidence": "/affected/0/versions"
},
{
"value": "27+dfsg-1",
"evidence": "/affected/0/versions"
},
{
"value": "27.1+dfsg-1",
"evidence": "/affected/0/versions"
},
{
"value": "27.1+dfsg-2",
"evidence": "/affected/0/versions"
}
]
},
{
"name": {
"value": "openvpn3-client",
"evidence": "/affected/1/package/name"
},
"prerequisites": [],
"fixed_versions": [],
"affected_versions": [
{
"value": "24.1+dfsg-1",
"evidence": "/affected/1/versions"
},
{
"value": "25+dfsg-1",
"evidence": "/affected/1/versions"
},
{
"value": "25+dfsg-2",
"evidence": "/affected/1/versions"
},
{
"value": "25+dfsg-3",
"evidence": "/affected/1/versions"
},
{
"value": "25+dfsg-4",
"evidence": "/affected/1/versions"
},
{
"value": "26+dfsg-1",
"evidence": "/affected/1/versions"
},
{
"value": "26+dfsg-2",
"evidence": "/affected/1/versions"
},
{
"value": "27+dfsg-1",
"evidence": "/affected/1/versions"
},
{
"value": "27.1+dfsg-1",
"evidence": "/affected/1/versions"
},
{
"value": "27.1+dfsg-2",
"evidence": "/affected/1/versions"
}
]
}
],
"severity": "medium",
"structured": {
"id": "DEBIAN-CVE-2026-106017",
"aliases": [
"DEBIAN-CVE-2026-106017"
],
"metrics": [
{
"type": "CVSS_V4",
"score": "CVSS:4.0/AV:N/AC:H/AT:P/PR:N/UI:N/VC:H/VI:N/VA:N/SC:H/SI:N/SA:N/E:U/CR:X/IR:X/AR:X/MAV:X/MAC:X/MAT:X/MPR:X/MUI:X/MVC:X/MVI:X/MVA:X/MSC:X/MSI:X/MSA:X/S:X/AU:X/R:X/V:X/RE:X/U:X"
}
],
"affected": [
{
"ranges": [
{
"type": "ECOSYSTEM",
"events": [
{
"introduced": "0"
}
]
}
],
"package": {
"name": "openvpn3-client",
"purl": "pkg:deb/debian/openvpn3-client?arch=source&distro=trixie",
"ecosystem": "Debian:13"
},
"versions": [
"24.1+dfsg-1",
"25+dfsg-1",
"25+dfsg-2",
"25+dfsg-3",
"25+dfsg-4",
"26+dfsg-1",
"26+dfsg-2",
"27+dfsg-1",
"27.1+dfsg-1",
"27.1+dfsg-2"
],
"database_specific": {
"source": "https://storage.googleapis.com/debian-osv/debian-cve-osv/DEBIAN-CVE-2026-106017.json"
},
"ecosystem_specific": {
"urgency": "not yet assigned"
}
},
{
"ranges": [
{
"type": "ECOSYSTEM",
"events": [
{
"introduced": "0"
}
]
}
],
"package": {
"name": "openvpn3-client",
"purl": "pkg:deb/debian/openvpn3-client?arch=source&distro=forky",
"ecosystem": "Debian:14"
},
"versions": [
"24.1+dfsg-1",
"25+dfsg-1",
"25+dfsg-2",
"25+dfsg-3",
"25+dfsg-4",
"26+dfsg-1",
"26+dfsg-2",
"27+dfsg-1",
"27.1+dfsg-1",
"27.1+dfsg-2"
],
"database_specific": {
"source": "https://storage.googleapis.com/debian-osv/debian-cve-osv/DEBIAN-CVE-2026-106017.json"
},
"ecosystem_specific": {
"urgency": "not yet assigned"
}
}
],
"modified": "2026-10-25T09:00:06.730260108Z",
"provider": "osv",
"upstream": [
"CVE-2026-106017"
],
"references": [
"https://security-tracker.debian.org/tracker/CVE-2026-106017"
]
},
"related_cves": [
{
"value": "CVE-2026-106017",
"evidence": "/upstream"
}
],
"security_relevant": true,
"severity_evidence": "/severity/0/score"
},
"source_id": "core-osv",
"document_id": 445231,
"published_at": "2026-10-22T10:17:07.887+00:00"
}