What is CVE-2026-104033?

CVE-2026-104033 is a medium-severity vulnerability in Red Hat Enterprise Linux 10, classified under Off-by-one Error. CVSS score: 5.4/10. Published 2026-10-06.

How severe is CVE-2026-104033?

Medium severity. CVSS v3 base score is 5.4 out of 10.

Vulnerability in Red Hat Enterprise Linux 10

CVE-2026-104033

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.

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

CVSS v3 metric

CVSS v3 base score 5.4 (Medium). Vector: CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:L/I:L/A:N.

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-193 — Off-by-one Error

References

access.redhat.com/security/cve/CVE-2026-104033 (vdb-entry)
bugzilla.redhat.com/show_bug.cgi (issue-tracking)

Frequently asked questions

What is CVE-2026-104033?: CVE-2026-104033 is a medium-severity vulnerability in Red Hat Enterprise Linux 10, classified under Off-by-one Error. CVSS score: 5.4/10. Published 2026-10-06.
How severe is CVE-2026-104033?: Medium severity. CVSS v3 base score is 5.4 out of 10.