CVE-2026-104033 Red Hat CVE debrief

Who should care

System administrators and security teams managing systems with SSSD configured for LDAP-based account expiration should assess exposure and prioritize remediation. This includes verifying SSSD configurations for correct handling of account expiration, monitoring authentication attempts for potential bypass attempts, and applying patches from Red Hat for affected systems. Security teams should also review compensating controls for exposed systems while  

Why it matters

The flaw in SSSD allows unauthorized access to systems configured to enforce account expiration using LDAP shadow attributes. Defenders should verify and update SSSD configurations, monitor for unusual authentication attempts, and apply patches from Red Hat.

• Verify SSSD configurations for correct handling of account expiration
• Monitor authentication attempts for potential bypass attempts
• Apply patches from Red Hat for affected systems

Technical summary

SSSD incorrectly handles LDAP shadow expiration values of zero, treating them as active accounts instead of expired. This allows attackers with valid credentials for expired accounts to bypass access controls. The issue arises from SSSD's improper handling of LDAP shadow attributes, specifically when an account's expiration value is set to zero. To mitigate this vulnerability, defenders should focus on verifying and updating SSSD configurations, especially for systems using LDAP for account management, and monitor for unusual authentication attempts. Applying patches from Red Hat for affected systems is also crucial. Additionally, defenders should review compensating controls for exposed systems while  

Defensive priority

Defenders should prioritize verifying and updating SSSD configurations, especially for systems using LDAP for account management, and monitor for unusual authentication attempts.

Recommended defensive actions

• Verify and update SSSD configurations to correctly handle account expiration
• Monitor for unusual authentication attempts
• Review and apply patches from Red Hat for affected systems
• Check relevant monitoring, detection, and logs for exposed assets that need extra review
• Track exceptions, retest remediated assets, and close the item only after evidence is documented.
• Confirm whether affected product deployments exist in managed environments and assign an owner for follow-up.
• Plan vendor-supported updates or mitigations through normal change control where exposure is confirmed.

Evidence notes

The CVE record and source item provide details on the flaw in SSSD and its potential impact. However, specific versions affected and detailed exploitation scenarios are not provided, requiring further verification.

Sources and references

Methodology and review provenance

AI-assisted synthesis based on stored public vulnerability evidence. System validation, approval state, and publication status do not by themselves establish human review of this revision. PatchSiren helps prioritize defensive review and does not prove exposure or remediation on any system.