CVE-2026-76560 389-ds-base: 389-ds: anonymous ldap client can defeat selfdn aci bind-rule checks via empty bind dn
An anonymous LDAP client can bypass SELFDN access controls to modify directory entries, requiring a patch for Red Hat Directory Server.
- Exploited in the wild
- Not known
- Login needed
- Not needed
- Attackable
- Over the internet
- Victim action needed
- Not needed
- Fix
- Available
What is CVE-2026-76560?
CVE-2026-76560 is a high-severity authentication bypass vulnerability in Red Hat Directory Server 11, published on 7 Sep 2026. An attacker can exploit it over the internet without logging in, with no action from the victim.
Official description
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.
Weakness: CWE-863
Which versions are affected by CVE-2026-76560?
How do I fix CVE-2026-76560?
Apply the vendor's patch.
Upgrade, and rotate credentials and sessions that may have been exposed. More about Authentication bypass.
Is CVE-2026-76560 being exploited?
There is no known exploitation of CVE-2026-76560 in the wild and no public exploit code.
Sources
Also known as AZL-99977, DEBIAN-CVE-2026-76560, GHSA-g4xg-g9jg-549h, UBUNTU-CVE-2026-76560.