What is CVE-2026-104040?

CVE-2026-104040 is a medium-severity vulnerability in Red Hat Enterprise Linux 10, classified under CWE-140. CVSS score: 4.4/10. Published 2026-10-06.

How severe is CVE-2026-104040?

Medium severity. CVSS v3 base score is 4.4 out of 10.

Vulnerability in Red Hat Enterprise Linux 10

CVE-2026-104040

A flaw was found in SSSD. When configured with the Entra ID identity provider, input lookup names containing single quotes are not properly escaped before being included in Microsoft Graph Open Data Protocol (OData) queries. A low-privileged local user can exploit this flaw by submitting a crafted search request, altering query filters to broaden user or group searches. This can lead to information disclosure by retrieving unintended directory objects, as well as a Denial of Service (DoS) through excessive processing and cache population.

Published 2026-10-06 · last modified 2026-10-06.

CVSS v3 metric

CVSS v3 base score 4.4 (Medium). Vector: CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:L/I:N/A:L.

EPSS exploit prediction

No EPSS score from FIRST.org yet. New CVEs usually get one within a few days; no score means no signal yet, not low risk. How EPSS works.

Affected products

Weakness classification (CWE)

CWE-140

References

access.redhat.com/security/cve/CVE-2026-104040 (vdb-entry)
bugzilla.redhat.com/show_bug.cgi (issue-tracking)

Frequently asked questions

What is CVE-2026-104040?: CVE-2026-104040 is a medium-severity vulnerability in Red Hat Enterprise Linux 10, classified under CWE-140. CVSS score: 4.4/10. Published 2026-10-06.
How severe is CVE-2026-104040?: Medium severity. CVSS v3 base score is 4.4 out of 10.