CriticalFix available
strongswan — security advisory
strongSwan 5.9.8 and 5.9.9 potentially allows remote code execution because it uses a variable named "public" for two different purposes within the same function. There is initially incorrect access control, later followed by an expired pointer dereference. One attack vector is sending an untrusted client certificate during EAP-TLS. A server is affected only if it loads plugins that implement TLS-based EAP methods (EAP-TLS, EAP-TTLS, EAP-PEAP, or EAP-TNC). This is fixed in 5.9.10.
- Products
- strongswan
- Affected versions
- Not specified
- Fixed versions
- 5.9.10-r0
- CVEs
- CVE-2023-26463
- Confirmed fixed CVEs
- Not specified
- Updated in this feed
- 1 Nov 2026, 14:55 UTC · Revision 1
Source evidence
strongSwan 5.9.8 and 5.9.9 potentially allows remote code execution because it uses a variable named "public" for two different purposes within the same function. There is initially incorrect access control, later followed by an expired pointer dereference. One attack vector is sending an untrusted client certificate during EAP-TLS. A server is affected only if it loads plugins that implement TLS-based EAP methods (EAP-TLS, EAP-TTLS, EAP-PEAP, or EAP-TNC). This is fixed in 5.9.10.
osv:ALPINE-CVE-2023-26463
strongswan
Fixed versions: 5.9.10-r0
strongswan
Fixed versions: 5.9.10-r0
strongswan
Fixed versions: 5.9.10-r0
strongswan
Fixed versions: 5.9.10-r0
strongswan
Fixed versions: 5.9.10-r0
strongswan
Fixed versions: 5.9.10-r0
strongswan
Fixed versions: 5.9.10-r0
strongswan
Fixed versions: 5.9.10-r0
Complete source record
{
"id": "9943295a27dd95e1e5ac105a02abf217b468de443fb30ece4b349b61809820e4",
"url": "https://osv.dev/vulnerability/ALPINE-CVE-2023-26463",
"method": "structured",
"payload": {
"kind": "advisory",
"title": "ALPINE-CVE-2023-26463",
"summary": "strongSwan 5.9.8 and 5.9.9 potentially allows remote code execution because it uses a variable named \"public\" for two different purposes within the same function. There is initially incorrect access control, later followed by an expired pointer dereference. One attack vector is sending an untrusted client certificate during EAP-TLS. A server is affected only if it loads plugins that implement TLS-based EAP methods (EAP-TLS, EAP-TTLS, EAP-PEAP, or EAP-TNC). This is fixed in 5.9.10.",
"evidence": "osv:ALPINE-CVE-2023-26463",
"products": [
{
"name": {
"value": "strongswan",
"evidence": "/affected/0/package/name"
},
"prerequisites": [],
"fixed_versions": [
{
"value": "5.9.10-r0",
"evidence": "/affected/0/ranges"
}
],
"affected_versions": []
},
{
"name": {
"value": "strongswan",
"evidence": "/affected/1/package/name"
},
"prerequisites": [],
"fixed_versions": [
{
"value": "5.9.10-r0",
"evidence": "/affected/1/ranges"
}
],
"affected_versions": []
},
{
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"evidence": "/affected/2/package/name"
},
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"fixed_versions": [
{
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"evidence": "/affected/2/ranges"
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],
"affected_versions": []
},
{
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{
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}
],
"affected_versions": []
},
{
"name": {
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"evidence": "/affected/4/package/name"
},
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"fixed_versions": [
{
"value": "5.9.10-r0",
"evidence": "/affected/4/ranges"
}
],
"affected_versions": []
},
{
"name": {
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"evidence": "/affected/5/package/name"
},
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{
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"evidence": "/affected/5/ranges"
}
],
"affected_versions": []
},
{
"name": {
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"evidence": "/affected/6/package/name"
},
"prerequisites": [],
"fixed_versions": [
{
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"evidence": "/affected/6/ranges"
}
],
"affected_versions": []
},
{
"name": {
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"evidence": "/affected/7/package/name"
},
"prerequisites": [],
"fixed_versions": [
{
"value": "5.9.10-r0",
"evidence": "/affected/7/ranges"
}
],
"affected_versions": []
}
],
"severity": "critical",
"structured": {
"id": "ALPINE-CVE-2023-26463",
"aliases": [
"ALPINE-CVE-2023-26463"
],
"metrics": [
{
"type": "CVSS_V3",
"score": "CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H"
}
],
"affected": [
{
"ranges": [
{
"type": "ECOSYSTEM",
"events": [
{
"introduced": "0"
},
{
"fixed": "5.9.10-r0"
}
]
}
],
"package": {
"name": "strongswan",
"purl": "pkg:apk/alpine/strongswan?arch=source",
"ecosystem": "Alpine:v3.17"
},
"database_specific": {
"source": "https://storage.googleapis.com/cve-osv-conversion/alpine/ALPINE-CVE-2023-26463.json"
},
"ecosystem_specific": {}
},
{
"ranges": [
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"introduced": "0"
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{
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],
"package": {
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"purl": "pkg:apk/alpine/strongswan?arch=source",
"ecosystem": "Alpine:v3.18"
},
"database_specific": {
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{
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"package": {
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"ecosystem": "Alpine:v3.19"
},
"database_specific": {
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{
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"package": {
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"ecosystem": "Alpine:v3.20"
},
"database_specific": {
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"ecosystem_specific": {}
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{
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{
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],
"package": {
"name": "strongswan",
"purl": "pkg:apk/alpine/strongswan?arch=source",
"ecosystem": "Alpine:v3.21"
},
"database_specific": {
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},
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{
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],
"package": {
"name": "strongswan",
"purl": "pkg:apk/alpine/strongswan?arch=source",
"ecosystem": "Alpine:v3.22"
},
"database_specific": {
"source": "https://storage.googleapis.com/cve-osv-conversion/alpine/ALPINE-CVE-2023-26463.json"
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{
"ranges": [
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],
"package": {
"name": "strongswan",
"purl": "pkg:apk/alpine/strongswan?arch=source",
"ecosystem": "Alpine:v3.23"
},
"database_specific": {
"source": "https://storage.googleapis.com/cve-osv-conversion/alpine/ALPINE-CVE-2023-26463.json"
},
"ecosystem_specific": {}
},
{
"ranges": [
{
"type": "ECOSYSTEM",
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{
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},
{
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}
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],
"package": {
"name": "strongswan",
"purl": "pkg:apk/alpine/strongswan?arch=source",
"ecosystem": "Alpine:v3.24"
},
"database_specific": {
"source": "https://storage.googleapis.com/cve-osv-conversion/alpine/ALPINE-CVE-2023-26463.json"
},
"ecosystem_specific": {}
}
],
"modified": "2026-10-26T17:17:58.613796223Z",
"provider": "osv",
"upstream": [
"CVE-2023-26463"
],
"references": [
"https://security.alpinelinux.org/vuln/CVE-2023-26463"
]
},
"related_cves": [
{
"value": "CVE-2023-26463",
"evidence": "/upstream"
}
],
"security_relevant": true,
"severity_evidence": "/severity/0/score"
},
"source_id": "core-osv",
"document_id": 454400,
"published_at": "2023-04-15T00:15:07.487+00:00"
}