Vulnerability · Published Oct 6, 2026 · Assigned by redhat
CVE-2026-92821Sssd: sssd: access control bypass via premature ldap access rule evaluation
Medium 6.8
In plain English
A medium-severity security flaw in Red Hat Enterprise Linux 10 from Red Hat. There are no confirmed reports of exploitation so far. The chance it is exploited in the next 30 days is estimated at 0.3% (higher than 24% of all known vulnerabilities).
Official description
A flaw was found in SSSD. When configured to evaluate password expiration warnings before restrictive access rules in LDAP (Lightweight Directory Access Protocol) environments, an expired-password warning terminates rule evaluation early and treats the access request as successful. A remote authenticated user with an expired password using an alternative authentication method, such as SSH public key authentication, can exploit this flaw to bypass access control restrictions and gain unauthorized access to protected systems.
Affected packages & fixed versions
| Ecosystem | Package | Fixed in | Advisory |
|---|---|---|---|
| Debian:12 | sssd | no fix listed | DEBIAN-CVE-2026-92821 |
| Debian:13 | sssd | no fix listed | DEBIAN-CVE-2026-92821 |
| Ubuntu:22.04:LTS | sssd | no fix listed | UBUNTU-CVE-2026-92821 |
| Ubuntu:24.04:LTS | sssd | no fix listed | UBUNTU-CVE-2026-92821 |
| Ubuntu:26.04:LTS | sssd | no fix listed | UBUNTU-CVE-2026-92821 |
| Ubuntu:26.10 | sssd | no fix listed | UBUNTU-CVE-2026-92821 |
Affected products (as reported)
| Vendor | Product | Versions |
|---|---|---|
| Red Hat | Red Hat Enterprise Linux 10 | see references |
| Red Hat | Red Hat Enterprise Linux 6 | see references |
| Red Hat | Red Hat Enterprise Linux 7 | see references |
| Red Hat | Red Hat Enterprise Linux 8 | see references |
| Red Hat | Red Hat Enterprise Linux 9 | see references |
| Red Hat | Red Hat OpenShift Container Platform 4 | see references |
| Red Hat | Red Hat OpenShift Container Platform 4 | see references |
Weakness: CWE-393 · Vector: CVSS:3.1/AV:N/AC:H/PR:L/UI:N/S:U/C:H/I:H/A:N
References
- https://access.redhat.com/security/cve/CVE-2026-92821 vdb-entry, x_refsource_REDHAT
- RHBZ#2479031 issue-tracking, x_refsource_REDHAT