CriticalFix available
openvpn — security advisory
OpenVPN 2.1 until v2.4.12 and v2.5.6 may enable authentication bypass in external authentication plug-ins when more than one of them makes use of deferred authentication replies, which allows an external user to be granted access with only partially correct credentials.
- Products
- openvpn
- Affected versions
- Not specified
- Fixed versions
- 2.4.12-r0, 2.5.6-r0
- CVEs
- CVE-2022-0547
- Confirmed fixed CVEs
- Not specified
- Updated in this feed
- 30 Oct 2026, 14:08 UTC · Revision 1
Source evidence
OpenVPN 2.1 until v2.4.12 and v2.5.6 may enable authentication bypass in external authentication plug-ins when more than one of them makes use of deferred authentication replies, which allows an external user to be granted access with only partially correct credentials.
osv:ALPINE-CVE-2022-0547
openvpn
Fixed versions: 2.4.12-r0
openvpn
Fixed versions: 2.5.6-r0
openvpn
Fixed versions: 2.5.6-r0
openvpn
Fixed versions: 2.5.6-r0
openvpn
Fixed versions: 2.5.6-r0
openvpn
Fixed versions: 2.5.6-r0
openvpn
Fixed versions: 2.5.6-r0
openvpn
Fixed versions: 2.5.6-r0
openvpn
Fixed versions: 2.5.6-r0
openvpn
Fixed versions: 2.5.6-r0
openvpn
Fixed versions: 2.5.6-r0
openvpn
Fixed versions: 2.5.6-r0
openvpn
Fixed versions: 2.5.6-r0
Complete source record
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"id": "c765cd8b290b6e7fd1898d2eb60e4eae6415b93b345ade06f4ef23b23004ea42",
"url": "https://osv.dev/vulnerability/ALPINE-CVE-2022-0547",
"method": "structured",
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"title": "ALPINE-CVE-2022-0547",
"summary": "OpenVPN 2.1 until v2.4.12 and v2.5.6 may enable authentication bypass in external authentication plug-ins when more than one of them makes use of deferred authentication replies, which allows an external user to be granted access with only partially correct credentials.",
"evidence": "osv:ALPINE-CVE-2022-0547",
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],
"severity": "critical",
"structured": {
"id": "ALPINE-CVE-2022-0547",
"aliases": [
"ALPINE-CVE-2022-0547"
],
"metrics": [
{
"type": "CVSS_V3",
"score": "CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H"
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],
"modified": "2026-10-15T07:17:54.143400989Z",
"provider": "osv",
"upstream": [
"CVE-2022-0547"
],
"references": [
"https://security.alpinelinux.org/vuln/CVE-2022-0547"
]
},
"related_cves": [
{
"value": "CVE-2022-0547",
"evidence": "/upstream"
}
],
"security_relevant": true,
"severity_evidence": "/severity/0/score"
},
"source_id": "core-osv",
"document_id": 321603,
"published_at": "2022-03-18T18:15:12.017+00:00"
}