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UnratedFix available

Moderate: sssd security update

Type: advisorySources: OSV

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

Moderate: sssd security update

core-osv · Original source

Published 7 Oct 2026, 00:00 UTC

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"
                },
                {
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          }
        },
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                }
              ]
            }
          ],
          "package": {
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            "purl": "pkg:rpm/almalinux/sssd-winbind-idmap",
            "ecosystem": "AlmaLinux:10"
          },
          "database_specific": {
            "source": "https://github.com/AlmaLinux/osv-database/blob/master/advisories/almalinux10/ALSA-2026:77534.json"
          }
        }
      ],
      "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"
}