High
sssd — security advisory
A flaw was found in SSSD. In trust-enabled identity management environments, SSSD evaluates Host-Based Access Control (HBAC) rules by stripping domain qualifiers and comparing only short usernames. An authenticated user in a trusted domain who shares the same username as an authorized local account can bypass access policies and gain unauthorized access to protected services or hosts.
- Products
- sssd
- Affected versions
- 2.10.1-1, 2.10.1-2, 2.11.1-1, 2.11.1-2, 2.11.1-2.1, 2.12.0-1, 2.12.0-2, 2.12.0-3~exp0, 2.12.0-4, 2.13.1-1, 2.13.1-2, 2.13.1-3, 2.8.2-4, 2.8.2-4+deb12u1, 2.9.1-1, 2.9.1-2, 2.9.2-1, 2.9.4-1, 2.9.4-1.1, 2.9.4-1.1~exp1, 2.9.4-2, 2.9.5-1, 2.9.5-2, 2.9.5-3, 2.9.5-4, 2.9.5-5
- Fixed versions
- Not specified
- CVEs
- CVE-2026-104048
- Confirmed fixed CVEs
- Not specified
- Updated in this feed
- 29 Oct 2026, 07:15 UTC · Revision 1
Source evidence
A flaw was found in SSSD. In trust-enabled identity management environments, SSSD evaluates Host-Based Access Control (HBAC) rules by stripping domain qualifiers and comparing only short usernames. An authenticated user in a trusted domain who shares the same username as an authorized local account can bypass access policies and gain unauthorized access to protected services or hosts.
osv:DEBIAN-CVE-2026-104048
sssd
Fixed versions: Not specified
sssd
Fixed versions: Not specified
Complete source record
{
"id": "ecbf6b46eae10ac4291f1d2e9ac7be5ec221816ede3f2b84fb3e0f65b9f0fc88",
"url": "https://osv.dev/vulnerability/DEBIAN-CVE-2026-104048",
"method": "structured",
"payload": {
"kind": "advisory",
"title": "DEBIAN-CVE-2026-104048",
"summary": "A flaw was found in SSSD. In trust-enabled identity management environments, SSSD evaluates Host-Based Access Control (HBAC) rules by stripping domain qualifiers and comparing only short usernames. An authenticated user in a trusted domain who shares the same username as an authorized local account can bypass access policies and gain unauthorized access to protected services or hosts.",
"evidence": "osv:DEBIAN-CVE-2026-104048",
"products": [
{
"name": {
"value": "sssd",
"evidence": "/affected/0/package/name"
},
"prerequisites": [],
"fixed_versions": [],
"affected_versions": [
{
"value": "2.10.1-1",
"evidence": "/affected/0/versions"
},
{
"value": "2.10.1-2",
"evidence": "/affected/0/versions"
},
{
"value": "2.11.1-1",
"evidence": "/affected/0/versions"
},
{
"value": "2.11.1-2",
"evidence": "/affected/0/versions"
},
{
"value": "2.11.1-2.1",
"evidence": "/affected/0/versions"
},
{
"value": "2.12.0-1",
"evidence": "/affected/0/versions"
},
{
"value": "2.12.0-2",
"evidence": "/affected/0/versions"
},
{
"value": "2.12.0-3~exp0",
"evidence": "/affected/0/versions"
},
{
"value": "2.12.0-4",
"evidence": "/affected/0/versions"
},
{
"value": "2.13.1-1",
"evidence": "/affected/0/versions"
},
{
"value": "2.13.1-2",
"evidence": "/affected/0/versions"
},
{
"value": "2.13.1-3",
"evidence": "/affected/0/versions"
},
{
"value": "2.8.2-4",
"evidence": "/affected/0/versions"
},
{
"value": "2.8.2-4+deb12u1",
"evidence": "/affected/0/versions"
},
{
"value": "2.9.1-1",
"evidence": "/affected/0/versions"
},
{
"value": "2.9.1-2",
"evidence": "/affected/0/versions"
},
{
"value": "2.9.2-1",
"evidence": "/affected/0/versions"
},
{
"value": "2.9.4-1",
"evidence": "/affected/0/versions"
},
{
"value": "2.9.4-1.1",
"evidence": "/affected/0/versions"
},
{
"value": "2.9.4-1.1~exp1",
"evidence": "/affected/0/versions"
},
{
"value": "2.9.4-2",
"evidence": "/affected/0/versions"
},
{
"value": "2.9.5-1",
"evidence": "/affected/0/versions"
},
{
"value": "2.9.5-2",
"evidence": "/affected/0/versions"
},
{
"value": "2.9.5-3",
"evidence": "/affected/0/versions"
},
{
"value": "2.9.5-4",
"evidence": "/affected/0/versions"
},
{
"value": "2.9.5-5",
"evidence": "/affected/0/versions"
}
]
},
{
"name": {
"value": "sssd",
"evidence": "/affected/1/package/name"
},
"prerequisites": [],
"fixed_versions": [],
"affected_versions": [
{
"value": "2.10.1-2",
"evidence": "/affected/1/versions"
},
{
"value": "2.11.1-1",
"evidence": "/affected/1/versions"
},
{
"value": "2.11.1-2",
"evidence": "/affected/1/versions"
},
{
"value": "2.11.1-2.1",
"evidence": "/affected/1/versions"
},
{
"value": "2.12.0-1",
"evidence": "/affected/1/versions"
},
{
"value": "2.12.0-2",
"evidence": "/affected/1/versions"
},
{
"value": "2.12.0-3~exp0",
"evidence": "/affected/1/versions"
},
{
"value": "2.12.0-4",
"evidence": "/affected/1/versions"
},
{
"value": "2.13.1-1",
"evidence": "/affected/1/versions"
},
{
"value": "2.13.1-2",
"evidence": "/affected/1/versions"
},
{
"value": "2.13.1-3",
"evidence": "/affected/1/versions"
}
]
}
],
"severity": "high",
"structured": {
"id": "DEBIAN-CVE-2026-104048",
"aliases": [
"DEBIAN-CVE-2026-104048"
],
"metrics": [
{
"type": "CVSS_V3",
"score": "CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:N"
}
],
"affected": [
{
"ranges": [
{
"type": "ECOSYSTEM",
"events": [
{
"introduced": "0"
}
]
}
],
"package": {
"name": "sssd",
"purl": "pkg:deb/debian/sssd?arch=source&distro=bookworm",
"ecosystem": "Debian:12"
},
"versions": [
"2.10.1-1",
"2.10.1-2",
"2.11.1-1",
"2.11.1-2",
"2.11.1-2.1",
"2.12.0-1",
"2.12.0-2",
"2.12.0-3~exp0",
"2.12.0-4",
"2.13.1-1",
"2.13.1-2",
"2.13.1-3",
"2.8.2-4",
"2.8.2-4+deb12u1",
"2.9.1-1",
"2.9.1-2",
"2.9.2-1",
"2.9.4-1",
"2.9.4-1.1",
"2.9.4-1.1~exp1",
"2.9.4-2",
"2.9.5-1",
"2.9.5-2",
"2.9.5-3",
"2.9.5-4",
"2.9.5-5"
],
"database_specific": {
"source": "https://storage.googleapis.com/debian-osv/debian-cve-osv/DEBIAN-CVE-2026-104048.json"
},
"ecosystem_specific": {
"urgency": "not yet assigned"
}
},
{
"ranges": [
{
"type": "ECOSYSTEM",
"events": [
{
"introduced": "0"
}
]
}
],
"package": {
"name": "sssd",
"purl": "pkg:deb/debian/sssd?arch=source&distro=trixie",
"ecosystem": "Debian:13"
},
"versions": [
"2.10.1-2",
"2.11.1-1",
"2.11.1-2",
"2.11.1-2.1",
"2.12.0-1",
"2.12.0-2",
"2.12.0-3~exp0",
"2.12.0-4",
"2.13.1-1",
"2.13.1-2",
"2.13.1-3"
],
"database_specific": {
"source": "https://storage.googleapis.com/debian-osv/debian-cve-osv/DEBIAN-CVE-2026-104048.json"
},
"ecosystem_specific": {
"urgency": "not yet assigned"
}
}
],
"modified": "2026-10-10T10:00:09.259889947Z",
"provider": "osv",
"upstream": [
"CVE-2026-104048"
],
"references": [
"https://security-tracker.debian.org/tracker/CVE-2026-104048"
]
},
"related_cves": [
{
"value": "CVE-2026-104048",
"evidence": "/upstream"
}
],
"security_relevant": true,
"severity_evidence": "/severity/0/score"
},
"source_id": "core-osv",
"document_id": 228585,
"published_at": "2026-10-06T20:17:14.977+00:00"
}