CVE-2026-92821 Sssd: sssd: access control bypass via premature ldap access rule evaluation
Authenticated users with expired passwords can bypass access controls in SSSD when password expiration warnings are evaluated before restrictive LDAP rules.
- Exploited in the wild
- Not known
- Login needed
- Any signed-in user
- Attackable
- Over the internet
- Victim action needed
- Not needed
- Fix
- None listed
What is CVE-2026-92821?
CVE-2026-92821 is a medium-severity authentication bypass vulnerability in Red Hat Enterprise Linux 10, published on 6 Oct 2026. Any signed-in user can exploit it over the network, with no action from the victim.
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.
Weakness: CWE-393
Which versions are affected by CVE-2026-92821?
How do I fix CVE-2026-92821?
No fix has been published for CVE-2026-92821 yet. Limit exposure of the affected software until one is available.
Upgrade, and rotate credentials and sessions that may have been exposed. More about Authentication bypass.
Is CVE-2026-92821 being exploited?
There is no known exploitation of CVE-2026-92821 in the wild and no public exploit code.
Sources
Also known as DEBIAN-CVE-2026-92821, GHSA-3hrm-ww2w-wqqc, UBUNTU-CVE-2026-92821.