Auth bypass in Red Hat Directory Server 11

CVE-2026-76560

A flaw was found in 389 Directory Server. The SELFDN ACI bind-rule evaluator incorrectly matches an anonymous LDAP client's empty bind DN against an empty stored attribute value, allowing an unauthenticated client to satisfy access control checks intended to require a matching authenticated identity. This can allow an anonymous LDAP client to perform an operation, such as adding or modifying a directory entry, that a SELFDN-based ACI intended to restrict to a specific authenticated user.

Vulnerability class: Broken Access Control

CVSS v3 metric

CVSS v3 base score 7.5 (High). Vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:H/A:N.

Affected products

Weakness classification (CWE)

References

Frequently asked questions

What is CVE-2026-76560?
CVE-2026-76560 is a high-severity vulnerability in Red Hat Directory Server 11, classified under Incorrect Authorization. CVSS score: 7.5/10. Published 2026-09-07.
How severe is CVE-2026-76560?
High severity. CVSS v3 base score is 7.5 out of 10.