Medium
wget2 — security advisory
wget2 accepts a server certificate with incorrect Key Usage (KU) or Extended Key Usage (EKU). If the attackers compromise a certificate (with the associated private key) issued for a different purpose, they may be able to reuse it for TLS server authentication.
- Products
- wget2
- Affected versions
- 1.99.1-2.2, 2.1.0-1, 2.1.0-2, 2.1.0-2.1, 2.1.0-2.1~exp1, 2.1.0-3, 2.1.0-4, 2.1.0-5, 2.2.0+ds-1, 2.2.0+ds-1+deb13u1, 2.2.0+ds-1~exp1, 2.2.0+ds-1~exp2, 2.2.0+ds-1~exp3, 2.2.0+ds-2, 2.2.0+ds-3
- Fixed versions
- Not specified
- CVEs
- CVE-2026-1858
- Confirmed fixed CVEs
- Not specified
- Updated in this feed
- 1 Nov 2026, 17:37 UTC · Revision 2
Source evidence
wget2 accepts a server certificate with incorrect Key Usage (KU) or Extended Key Usage (EKU). If the attackers compromise a certificate (with the associated private key) issued for a different purpose, they may be able to reuse it for TLS server authentication.
osv:DEBIAN-CVE-2026-1858
wget2
Fixed versions: Not specified
wget2
Fixed versions: Not specified
wget2
Fixed versions: Not specified
Complete source record
{
"id": "7aed03013ede49861835670ff9954a37d1ab49ef93fa2fb4953515ab05dddad7",
"url": "https://osv.dev/vulnerability/DEBIAN-CVE-2026-1858",
"method": "structured",
"payload": {
"kind": "advisory",
"title": "DEBIAN-CVE-2026-1858",
"summary": "wget2 accepts a server certificate with incorrect Key Usage (KU) or Extended Key Usage (EKU). If the attackers compromise a certificate (with the associated private key) issued for a different purpose, they may be able to reuse it for TLS server authentication.",
"evidence": "osv:DEBIAN-CVE-2026-1858",
"products": [
{
"name": {
"value": "wget2",
"evidence": "/affected/0/package/name"
},
"prerequisites": [],
"fixed_versions": [],
"affected_versions": [
{
"value": "1.99.1-2.2",
"evidence": "/affected/0/versions"
},
{
"value": "2.1.0-1",
"evidence": "/affected/0/versions"
},
{
"value": "2.1.0-2",
"evidence": "/affected/0/versions"
},
{
"value": "2.1.0-2.1",
"evidence": "/affected/0/versions"
},
{
"value": "2.1.0-2.1~exp1",
"evidence": "/affected/0/versions"
},
{
"value": "2.1.0-3",
"evidence": "/affected/0/versions"
},
{
"value": "2.1.0-4",
"evidence": "/affected/0/versions"
},
{
"value": "2.1.0-5",
"evidence": "/affected/0/versions"
},
{
"value": "2.2.0+ds-1",
"evidence": "/affected/0/versions"
},
{
"value": "2.2.0+ds-1~exp1",
"evidence": "/affected/0/versions"
},
{
"value": "2.2.0+ds-1~exp2",
"evidence": "/affected/0/versions"
},
{
"value": "2.2.0+ds-1~exp3",
"evidence": "/affected/0/versions"
},
{
"value": "2.2.0+ds-2",
"evidence": "/affected/0/versions"
},
{
"value": "2.2.0+ds-3",
"evidence": "/affected/0/versions"
}
]
},
{
"name": {
"value": "wget2",
"evidence": "/affected/1/package/name"
},
"prerequisites": [],
"fixed_versions": [],
"affected_versions": [
{
"value": "2.2.0+ds-1",
"evidence": "/affected/1/versions"
},
{
"value": "2.2.0+ds-1+deb13u1",
"evidence": "/affected/1/versions"
},
{
"value": "2.2.0+ds-2",
"evidence": "/affected/1/versions"
},
{
"value": "2.2.0+ds-3",
"evidence": "/affected/1/versions"
}
]
},
{
"name": {
"value": "wget2",
"evidence": "/affected/2/package/name"
},
"prerequisites": [],
"fixed_versions": [],
"affected_versions": [
{
"value": "2.2.0+ds-1",
"evidence": "/affected/2/versions"
},
{
"value": "2.2.0+ds-2",
"evidence": "/affected/2/versions"
},
{
"value": "2.2.0+ds-3",
"evidence": "/affected/2/versions"
}
]
}
],
"severity": "medium",
"structured": {
"id": "DEBIAN-CVE-2026-1858",
"aliases": [
"DEBIAN-CVE-2026-1858"
],
"metrics": [
{
"type": "CVSS_V3",
"score": "CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:L/I:L/A:N"
}
],
"affected": [
{
"ranges": [
{
"type": "ECOSYSTEM",
"events": [
{
"introduced": "0"
}
]
}
],
"package": {
"name": "wget2",
"purl": "pkg:deb/debian/wget2?arch=source&distro=bookworm",
"ecosystem": "Debian:12"
},
"versions": [
"1.99.1-2.2",
"2.1.0-1",
"2.1.0-2",
"2.1.0-2.1",
"2.1.0-2.1~exp1",
"2.1.0-3",
"2.1.0-4",
"2.1.0-5",
"2.2.0+ds-1",
"2.2.0+ds-1~exp1",
"2.2.0+ds-1~exp2",
"2.2.0+ds-1~exp3",
"2.2.0+ds-2",
"2.2.0+ds-3"
],
"database_specific": {
"source": "https://storage.googleapis.com/debian-osv/debian-cve-osv/DEBIAN-CVE-2026-1858.json"
},
"ecosystem_specific": {
"urgency": "not yet assigned"
}
},
{
"ranges": [
{
"type": "ECOSYSTEM",
"events": [
{
"introduced": "0"
}
]
}
],
"package": {
"name": "wget2",
"purl": "pkg:deb/debian/wget2?arch=source&distro=trixie",
"ecosystem": "Debian:13"
},
"versions": [
"2.2.0+ds-1",
"2.2.0+ds-1+deb13u1",
"2.2.0+ds-2",
"2.2.0+ds-3"
],
"database_specific": {
"source": "https://storage.googleapis.com/debian-osv/debian-cve-osv/DEBIAN-CVE-2026-1858.json"
},
"ecosystem_specific": {
"urgency": "not yet assigned"
}
},
{
"ranges": [
{
"type": "ECOSYSTEM",
"events": [
{
"introduced": "0"
}
]
}
],
"package": {
"name": "wget2",
"purl": "pkg:deb/debian/wget2?arch=source&distro=forky",
"ecosystem": "Debian:14"
},
"versions": [
"2.2.0+ds-1",
"2.2.0+ds-2",
"2.2.0+ds-3"
],
"database_specific": {
"source": "https://storage.googleapis.com/debian-osv/debian-cve-osv/DEBIAN-CVE-2026-1858.json"
},
"ecosystem_specific": {
"urgency": "not yet assigned"
}
}
],
"modified": "2026-10-27T09:47:30.587164455Z",
"provider": "osv",
"upstream": [
"CVE-2026-1858"
],
"references": [
"https://security-tracker.debian.org/tracker/CVE-2026-1858"
]
},
"related_cves": [
{
"value": "CVE-2026-1858",
"evidence": "/upstream"
}
],
"security_relevant": true,
"severity_evidence": "/severity/0/score"
},
"source_id": "core-osv",
"document_id": 460886,
"published_at": "2026-04-29T21:16:20.513+00:00"
}