Security Flaw in SSSD Affects Microsoft Identity Provider Interaction
CVE-2026-104040

4.4MEDIUM

Key Information:

Vendor

Red Hat
Status
Red Hat Enterprise Linux 10
Red Hat Enterprise Linux 6
Red Hat Enterprise Linux 7
Red Hat Enterprise Linux 8
Vendor
CVE Published:
6 October 2026

What is CVE-2026-104040?

A security flaw is present in SSSD when it interacts with the Entra ID identity provider. Specifically, input lookup names that include single quotes are not escaped correctly, leading to potential exploitation by low-privileged local users. By crafting specific search requests, an attacker could manipulate query filters to perform unauthorized searches for users or groups. This vulnerability may result in unintended information exposure by returning sensitive directory objects, and it could also facilitate a Denial of Service (DoS) attack through excessive processing demands and cache overflow.

References

https://access.redhat.com/security/cve/CVE-2026-104040
vdb-entryx_refsource_REDHAT
https://bugzilla.redhat.com/show_bug.cgi?id=2478915
issue-trackingx_refsource_REDHAT

CVSS V3.1

Score:
4.4
Severity:
MEDIUM
Confidentiality:
Low
Integrity:
None
Availability:
Low
Attack Vector:
Local
Attack Complexity:
Low
Privileges Required:
Low
User Interaction:
None
Scope:
Unchanged

Timeline

  • Vulnerability published

  • Vulnerability Reserved

Credit

This issue was discovered by Found by AISLE in partnership with Red Hat.
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