Moderate: sssd security update
The System Security Services Daemon (SSSD) service provides a set of daemons to manage access to remote directories and authentication mechanisms. It also provides the Name Service Switch (NSS) and the Pluggable Authentication Modules (PAM) interfaces toward the system, and a pluggable back-end system to connect to multiple different account sources. Security Fix(es): * sssd: sssd: IdP authentication prefix comparison allows cross-user impersonation (CVE-2026-87853) For more details about the security issue(s), including the impact, a CVSS score, acknowledgments, and other related information, refer to the CVE page(s) listed in the References section.
- Products
- libipa_hbac, libsss_autofs, libsss_certmap, libsss_idmap, libsss_nss_idmap, libsss_nss_idmap-devel, libsss_sudo, python3-libipa_hbac, python3-libsss_nss_idmap, python3-sss, python3-sss-murmur, python3-sssdconfig, sssd, sssd-ad, sssd-client, sssd-common, sssd-common-pac, sssd-dbus, sssd-idp, sssd-ipa, sssd-kcm, sssd-krb5, sssd-krb5-common, sssd-ldap, sssd-nfs-idmap, sssd-passkey, sssd-proxy, sssd-tools, sssd-winbind-idmap
- Affected versions
- Not specified
- Fixed versions
- 2.12.0-3.el10_2.2
- CVEs
- Not specified
- Confirmed fixed CVEs
- Not specified
- Updated in this feed
- 28 Oct 2026, 13:03 UTC · Revision 1
Source evidence
The System Security Services Daemon (SSSD) service provides a set of daemons to manage access to remote directories and authentication mechanisms. It also provides the Name Service Switch (NSS) and the Pluggable Authentication Modules (PAM) interfaces toward the system, and a pluggable back-end system to connect to multiple different account sources. Security Fix(es): * sssd: sssd: IdP authentication prefix comparison allows cross-user impersonation (CVE-2026-87853) For more details about the security issue(s), including the impact, a CVSS score, acknowledgments, and other related information, refer to the CVE page(s) listed in the References section.
osv:ALSA-2026:77534
libipa_hbac
Fixed versions: 2.12.0-3.el10_2.2
libsss_autofs
Fixed versions: 2.12.0-3.el10_2.2
libsss_certmap
Fixed versions: 2.12.0-3.el10_2.2
libsss_idmap
Fixed versions: 2.12.0-3.el10_2.2
libsss_nss_idmap
Fixed versions: 2.12.0-3.el10_2.2
libsss_nss_idmap-devel
Fixed versions: 2.12.0-3.el10_2.2
libsss_sudo
Fixed versions: 2.12.0-3.el10_2.2
python3-libipa_hbac
Fixed versions: 2.12.0-3.el10_2.2
python3-libsss_nss_idmap
Fixed versions: 2.12.0-3.el10_2.2
python3-sss
Fixed versions: 2.12.0-3.el10_2.2
python3-sss-murmur
Fixed versions: 2.12.0-3.el10_2.2
python3-sssdconfig
Fixed versions: 2.12.0-3.el10_2.2
sssd
Fixed versions: 2.12.0-3.el10_2.2
sssd-ad
Fixed versions: 2.12.0-3.el10_2.2
sssd-client
Fixed versions: 2.12.0-3.el10_2.2
sssd-common
Fixed versions: 2.12.0-3.el10_2.2
sssd-common-pac
Fixed versions: 2.12.0-3.el10_2.2
sssd-dbus
Fixed versions: 2.12.0-3.el10_2.2
sssd-idp
Fixed versions: 2.12.0-3.el10_2.2
sssd-ipa
Fixed versions: 2.12.0-3.el10_2.2
sssd-kcm
Fixed versions: 2.12.0-3.el10_2.2
sssd-krb5
Fixed versions: 2.12.0-3.el10_2.2
sssd-krb5-common
Fixed versions: 2.12.0-3.el10_2.2
sssd-ldap
Fixed versions: 2.12.0-3.el10_2.2
sssd-nfs-idmap
Fixed versions: 2.12.0-3.el10_2.2
sssd-passkey
Fixed versions: 2.12.0-3.el10_2.2
sssd-proxy
Fixed versions: 2.12.0-3.el10_2.2
sssd-tools
Fixed versions: 2.12.0-3.el10_2.2
sssd-winbind-idmap
Fixed versions: 2.12.0-3.el10_2.2
Complete source record
{
"id": "7f306f47c00ea64c87147b0e765f92f59b199775773748b1c8824cc2f63e1331",
"url": "https://osv.dev/vulnerability/ALSA-2026%3A77534",
"method": "structured",
"payload": {
"kind": "advisory",
"title": "Moderate: sssd security update",
"summary": "The System Security Services Daemon (SSSD) service provides a set of daemons to manage access to remote directories and authentication mechanisms. It also provides the Name Service Switch (NSS) and the Pluggable Authentication Modules (PAM) interfaces toward the system, and a pluggable back-end system to connect to multiple different account sources. Security Fix(es): * sssd: sssd: IdP authentication prefix comparison allows cross-user impersonation (CVE-2026-87853) For more details about the security issue(s), including the impact, a CVSS score, acknowledgments, and other related information, refer to the CVE page(s) listed in the References section.",
"evidence": "osv:ALSA-2026:77534",
"products": [
{
"name": {
"value": "libipa_hbac",
"evidence": "/affected/0/package/name"
},
"prerequisites": [],
"fixed_versions": [
{
"value": "2.12.0-3.el10_2.2",
"evidence": "/affected/0/ranges"
}
],
"affected_versions": []
},
{
"name": {
"value": "libsss_autofs",
"evidence": "/affected/1/package/name"
},
"prerequisites": [],
"fixed_versions": [
{
"value": "2.12.0-3.el10_2.2",
"evidence": "/affected/1/ranges"
}
],
"affected_versions": []
},
{
"name": {
"value": "libsss_certmap",
"evidence": "/affected/2/package/name"
},
"prerequisites": [],
"fixed_versions": [
{
"value": "2.12.0-3.el10_2.2",
"evidence": "/affected/2/ranges"
}
],
"affected_versions": []
},
{
"name": {
"value": "libsss_idmap",
"evidence": "/affected/3/package/name"
},
"prerequisites": [],
"fixed_versions": [
{
"value": "2.12.0-3.el10_2.2",
"evidence": "/affected/3/ranges"
}
],
"affected_versions": []
},
{
"name": {
"value": "libsss_nss_idmap",
"evidence": "/affected/4/package/name"
},
"prerequisites": [],
"fixed_versions": [
{
"value": "2.12.0-3.el10_2.2",
"evidence": "/affected/4/ranges"
}
],
"affected_versions": []
},
{
"name": {
"value": "libsss_nss_idmap-devel",
"evidence": "/affected/5/package/name"
},
"prerequisites": [],
"fixed_versions": [
{
"value": "2.12.0-3.el10_2.2",
"evidence": "/affected/5/ranges"
}
],
"affected_versions": []
},
{
"name": {
"value": "libsss_sudo",
"evidence": "/affected/6/package/name"
},
"prerequisites": [],
"fixed_versions": [
{
"value": "2.12.0-3.el10_2.2",
"evidence": "/affected/6/ranges"
}
],
"affected_versions": []
},
{
"name": {
"value": "python3-libipa_hbac",
"evidence": "/affected/7/package/name"
},
"prerequisites": [],
"fixed_versions": [
{
"value": "2.12.0-3.el10_2.2",
"evidence": "/affected/7/ranges"
}
],
"affected_versions": []
},
{
"name": {
"value": "python3-libsss_nss_idmap",
"evidence": "/affected/8/package/name"
},
"prerequisites": [],
"fixed_versions": [
{
"value": "2.12.0-3.el10_2.2",
"evidence": "/affected/8/ranges"
}
],
"affected_versions": []
},
{
"name": {
"value": "python3-sss",
"evidence": "/affected/9/package/name"
},
"prerequisites": [],
"fixed_versions": [
{
"value": "2.12.0-3.el10_2.2",
"evidence": "/affected/9/ranges"
}
],
"affected_versions": []
},
{
"name": {
"value": "python3-sss-murmur",
"evidence": "/affected/10/package/name"
},
"prerequisites": [],
"fixed_versions": [
{
"value": "2.12.0-3.el10_2.2",
"evidence": "/affected/10/ranges"
}
],
"affected_versions": []
},
{
"name": {
"value": "python3-sssdconfig",
"evidence": "/affected/11/package/name"
},
"prerequisites": [],
"fixed_versions": [
{
"value": "2.12.0-3.el10_2.2",
"evidence": "/affected/11/ranges"
}
],
"affected_versions": []
},
{
"name": {
"value": "sssd",
"evidence": "/affected/12/package/name"
},
"prerequisites": [],
"fixed_versions": [
{
"value": "2.12.0-3.el10_2.2",
"evidence": "/affected/12/ranges"
}
],
"affected_versions": []
},
{
"name": {
"value": "sssd-ad",
"evidence": "/affected/13/package/name"
},
"prerequisites": [],
"fixed_versions": [
{
"value": "2.12.0-3.el10_2.2",
"evidence": "/affected/13/ranges"
}
],
"affected_versions": []
},
{
"name": {
"value": "sssd-client",
"evidence": "/affected/14/package/name"
},
"prerequisites": [],
"fixed_versions": [
{
"value": "2.12.0-3.el10_2.2",
"evidence": "/affected/14/ranges"
}
],
"affected_versions": []
},
{
"name": {
"value": "sssd-common",
"evidence": "/affected/15/package/name"
},
"prerequisites": [],
"fixed_versions": [
{
"value": "2.12.0-3.el10_2.2",
"evidence": "/affected/15/ranges"
}
],
"affected_versions": []
},
{
"name": {
"value": "sssd-common-pac",
"evidence": "/affected/16/package/name"
},
"prerequisites": [],
"fixed_versions": [
{
"value": "2.12.0-3.el10_2.2",
"evidence": "/affected/16/ranges"
}
],
"affected_versions": []
},
{
"name": {
"value": "sssd-dbus",
"evidence": "/affected/17/package/name"
},
"prerequisites": [],
"fixed_versions": [
{
"value": "2.12.0-3.el10_2.2",
"evidence": "/affected/17/ranges"
}
],
"affected_versions": []
},
{
"name": {
"value": "sssd-idp",
"evidence": "/affected/18/package/name"
},
"prerequisites": [],
"fixed_versions": [
{
"value": "2.12.0-3.el10_2.2",
"evidence": "/affected/18/ranges"
}
],
"affected_versions": []
},
{
"name": {
"value": "sssd-ipa",
"evidence": "/affected/19/package/name"
},
"prerequisites": [],
"fixed_versions": [
{
"value": "2.12.0-3.el10_2.2",
"evidence": "/affected/19/ranges"
}
],
"affected_versions": []
},
{
"name": {
"value": "sssd-kcm",
"evidence": "/affected/20/package/name"
},
"prerequisites": [],
"fixed_versions": [
{
"value": "2.12.0-3.el10_2.2",
"evidence": "/affected/20/ranges"
}
],
"affected_versions": []
},
{
"name": {
"value": "sssd-krb5",
"evidence": "/affected/21/package/name"
},
"prerequisites": [],
"fixed_versions": [
{
"value": "2.12.0-3.el10_2.2",
"evidence": "/affected/21/ranges"
}
],
"affected_versions": []
},
{
"name": {
"value": "sssd-krb5-common",
"evidence": "/affected/22/package/name"
},
"prerequisites": [],
"fixed_versions": [
{
"value": "2.12.0-3.el10_2.2",
"evidence": "/affected/22/ranges"
}
],
"affected_versions": []
},
{
"name": {
"value": "sssd-ldap",
"evidence": "/affected/23/package/name"
},
"prerequisites": [],
"fixed_versions": [
{
"value": "2.12.0-3.el10_2.2",
"evidence": "/affected/23/ranges"
}
],
"affected_versions": []
},
{
"name": {
"value": "sssd-nfs-idmap",
"evidence": "/affected/24/package/name"
},
"prerequisites": [],
"fixed_versions": [
{
"value": "2.12.0-3.el10_2.2",
"evidence": "/affected/24/ranges"
}
],
"affected_versions": []
},
{
"name": {
"value": "sssd-passkey",
"evidence": "/affected/25/package/name"
},
"prerequisites": [],
"fixed_versions": [
{
"value": "2.12.0-3.el10_2.2",
"evidence": "/affected/25/ranges"
}
],
"affected_versions": []
},
{
"name": {
"value": "sssd-proxy",
"evidence": "/affected/26/package/name"
},
"prerequisites": [],
"fixed_versions": [
{
"value": "2.12.0-3.el10_2.2",
"evidence": "/affected/26/ranges"
}
],
"affected_versions": []
},
{
"name": {
"value": "sssd-tools",
"evidence": "/affected/27/package/name"
},
"prerequisites": [],
"fixed_versions": [
{
"value": "2.12.0-3.el10_2.2",
"evidence": "/affected/27/ranges"
}
],
"affected_versions": []
},
{
"name": {
"value": "sssd-winbind-idmap",
"evidence": "/affected/28/package/name"
},
"prerequisites": [],
"fixed_versions": [
{
"value": "2.12.0-3.el10_2.2",
"evidence": "/affected/28/ranges"
}
],
"affected_versions": []
}
],
"severity": "unknown",
"structured": {
"id": "ALSA-2026:77534",
"aliases": [
"ALSA-2026:77534"
],
"affected": [
{
"ranges": [
{
"type": "ECOSYSTEM",
"events": [
{
"introduced": "0"
},
{
"fixed": "2.12.0-3.el10_2.2"
}
]
}
],
"package": {
"name": "libipa_hbac",
"purl": "pkg:rpm/almalinux/libipa_hbac",
"ecosystem": "AlmaLinux:10"
},
"database_specific": {
"source": "https://github.com/AlmaLinux/osv-database/blob/master/advisories/almalinux10/ALSA-2026:77534.json"
}
},
{
"ranges": [
{
"type": "ECOSYSTEM",
"events": [
{
"introduced": "0"
},
{
"fixed": "2.12.0-3.el10_2.2"
}
]
}
],
"package": {
"name": "libsss_autofs",
"purl": "pkg:rpm/almalinux/libsss_autofs",
"ecosystem": "AlmaLinux:10"
},
"database_specific": {
"source": "https://github.com/AlmaLinux/osv-database/blob/master/advisories/almalinux10/ALSA-2026:77534.json"
}
},
{
"ranges": [
{
"type": "ECOSYSTEM",
"events": [
{
"introduced": "0"
},
{
"fixed": "2.12.0-3.el10_2.2"
}
]
}
],
"package": {
"name": "libsss_certmap",
"purl": "pkg:rpm/almalinux/libsss_certmap",
"ecosystem": "AlmaLinux:10"
},
"database_specific": {
"source": "https://github.com/AlmaLinux/osv-database/blob/master/advisories/almalinux10/ALSA-2026:77534.json"
}
},
{
"ranges": [
{
"type": "ECOSYSTEM",
"events": [
{
"introduced": "0"
},
{
"fixed": "2.12.0-3.el10_2.2"
}
]
}
],
"package": {
"name": "libsss_idmap",
"purl": "pkg:rpm/almalinux/libsss_idmap",
"ecosystem": "AlmaLinux:10"
},
"database_specific": {
"source": "https://github.com/AlmaLinux/osv-database/blob/master/advisories/almalinux10/ALSA-2026:77534.json"
}
},
{
"ranges": [
{
"type": "ECOSYSTEM",
"events": [
{
"introduced": "0"
},
{
"fixed": "2.12.0-3.el10_2.2"
}
]
}
],
"package": {
"name": "libsss_nss_idmap",
"purl": "pkg:rpm/almalinux/libsss_nss_idmap",
"ecosystem": "AlmaLinux:10"
},
"database_specific": {
"source": "https://github.com/AlmaLinux/osv-database/blob/master/advisories/almalinux10/ALSA-2026:77534.json"
}
},
{
"ranges": [
{
"type": "ECOSYSTEM",
"events": [
{
"introduced": "0"
},
{
"fixed": "2.12.0-3.el10_2.2"
}
]
}
],
"package": {
"name": "libsss_nss_idmap-devel",
"purl": "pkg:rpm/almalinux/libsss_nss_idmap-devel",
"ecosystem": "AlmaLinux:10"
},
"database_specific": {
"source": "https://github.com/AlmaLinux/osv-database/blob/master/advisories/almalinux10/ALSA-2026:77534.json"
}
},
{
"ranges": [
{
"type": "ECOSYSTEM",
"events": [
{
"introduced": "0"
},
{
"fixed": "2.12.0-3.el10_2.2"
}
]
}
],
"package": {
"name": "libsss_sudo",
"purl": "pkg:rpm/almalinux/libsss_sudo",
"ecosystem": "AlmaLinux:10"
},
"database_specific": {
"source": "https://github.com/AlmaLinux/osv-database/blob/master/advisories/almalinux10/ALSA-2026:77534.json"
}
},
{
"ranges": [
{
"type": "ECOSYSTEM",
"events": [
{
"introduced": "0"
},
{
"fixed": "2.12.0-3.el10_2.2"
}
]
}
],
"package": {
"name": "python3-libipa_hbac",
"purl": "pkg:rpm/almalinux/python3-libipa_hbac",
"ecosystem": "AlmaLinux:10"
},
"database_specific": {
"source": "https://github.com/AlmaLinux/osv-database/blob/master/advisories/almalinux10/ALSA-2026:77534.json"
}
},
{
"ranges": [
{
"type": "ECOSYSTEM",
"events": [
{
"introduced": "0"
},
{
"fixed": "2.12.0-3.el10_2.2"
}
]
}
],
"package": {
"name": "python3-libsss_nss_idmap",
"purl": "pkg:rpm/almalinux/python3-libsss_nss_idmap",
"ecosystem": "AlmaLinux:10"
},
"database_specific": {
"source": "https://github.com/AlmaLinux/osv-database/blob/master/advisories/almalinux10/ALSA-2026:77534.json"
}
},
{
"ranges": [
{
"type": "ECOSYSTEM",
"events": [
{
"introduced": "0"
},
{
"fixed": "2.12.0-3.el10_2.2"
}
]
}
],
"package": {
"name": "python3-sss",
"purl": "pkg:rpm/almalinux/python3-sss",
"ecosystem": "AlmaLinux:10"
},
"database_specific": {
"source": "https://github.com/AlmaLinux/osv-database/blob/master/advisories/almalinux10/ALSA-2026:77534.json"
}
},
{
"ranges": [
{
"type": "ECOSYSTEM",
"events": [
{
"introduced": "0"
},
{
"fixed": "2.12.0-3.el10_2.2"
}
]
}
],
"package": {
"name": "python3-sss-murmur",
"purl": "pkg:rpm/almalinux/python3-sss-murmur",
"ecosystem": "AlmaLinux:10"
},
"database_specific": {
"source": "https://github.com/AlmaLinux/osv-database/blob/master/advisories/almalinux10/ALSA-2026:77534.json"
}
},
{
"ranges": [
{
"type": "ECOSYSTEM",
"events": [
{
"introduced": "0"
},
{
"fixed": "2.12.0-3.el10_2.2"
}
]
}
],
"package": {
"name": "python3-sssdconfig",
"purl": "pkg:rpm/almalinux/python3-sssdconfig",
"ecosystem": "AlmaLinux:10"
},
"database_specific": {
"source": "https://github.com/AlmaLinux/osv-database/blob/master/advisories/almalinux10/ALSA-2026:77534.json"
}
},
{
"ranges": [
{
"type": "ECOSYSTEM",
"events": [
{
"introduced": "0"
},
{
"fixed": "2.12.0-3.el10_2.2"
}
]
}
],
"package": {
"name": "sssd",
"purl": "pkg:rpm/almalinux/sssd",
"ecosystem": "AlmaLinux:10"
},
"database_specific": {
"source": "https://github.com/AlmaLinux/osv-database/blob/master/advisories/almalinux10/ALSA-2026:77534.json"
}
},
{
"ranges": [
{
"type": "ECOSYSTEM",
"events": [
{
"introduced": "0"
},
{
"fixed": "2.12.0-3.el10_2.2"
}
]
}
],
"package": {
"name": "sssd-ad",
"purl": "pkg:rpm/almalinux/sssd-ad",
"ecosystem": "AlmaLinux:10"
},
"database_specific": {
"source": "https://github.com/AlmaLinux/osv-database/blob/master/advisories/almalinux10/ALSA-2026:77534.json"
}
},
{
"ranges": [
{
"type": "ECOSYSTEM",
"events": [
{
"introduced": "0"
},
{
"fixed": "2.12.0-3.el10_2.2"
}
]
}
],
"package": {
"name": "sssd-client",
"purl": "pkg:rpm/almalinux/sssd-client",
"ecosystem": "AlmaLinux:10"
},
"database_specific": {
"source": "https://github.com/AlmaLinux/osv-database/blob/master/advisories/almalinux10/ALSA-2026:77534.json"
}
},
{
"ranges": [
{
"type": "ECOSYSTEM",
"events": [
{
"introduced": "0"
},
{
"fixed": "2.12.0-3.el10_2.2"
}
]
}
],
"package": {
"name": "sssd-common",
"purl": "pkg:rpm/almalinux/sssd-common",
"ecosystem": "AlmaLinux:10"
},
"database_specific": {
"source": "https://github.com/AlmaLinux/osv-database/blob/master/advisories/almalinux10/ALSA-2026:77534.json"
}
},
{
"ranges": [
{
"type": "ECOSYSTEM",
"events": [
{
"introduced": "0"
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{
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],
"modified": "2026-10-09T18:00:04.250221762Z",
"provider": "osv",
"references": [
"https://access.redhat.com/errata/RHSA-2026:77534",
"https://access.redhat.com/security/cve/CVE-2026-87853",
"https://bugzilla.redhat.com/2530888",
"https://errata.almalinux.org/10/ALSA-2026-77534.html"
]
},
"related_cves": [],
"security_relevant": true,
"severity_evidence": null
},
"source_id": "core-osv",
"document_id": 124056,
"published_at": "2026-10-07T00:00:00+00:00"
}