CVE-2026-104033 Sssd: sssd: access control bypass via improper ldap shadow expiration check
Attackers with valid credentials for expired accounts can bypass access controls and authenticate to systems using SSSD with LDAP shadow expiration enabled.
- 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-2026-104033?
CVE-2026-104033 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 enforce account expiration using LDAP (Lightweight Directory Access Protocol) shadow attributes, SSSD fails to treat an expiration value of zero as an expired account. A user with valid credentials for an expired account can exploit this flaw to bypass access controls and authenticate to the system. This allows unauthorized access to persist after the account was intended to be deactivated.
Weakness: CWE-193
Which versions are affected by CVE-2026-104033?
How do I fix CVE-2026-104033?
No fix has been published for CVE-2026-104033 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-2026-104033 being exploited?
It is not confirmed as exploited in the wild, but public exploit code for CVE-2026-104033 exists.
Sources
Also known as DEBIAN-CVE-2026-104033, GHSA-v9m6-j2qm-86p2, UBUNTU-CVE-2026-104033.