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.
Published: 2026-09-07
Score: 7.5 High
EPSS: n/a
KEV: No
Impact: n/a
Action: n/a
AI Analysis

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Remediation

Vendor Workaround

Until a fix is available, review all ACIs using userattr="...#SELFDN" bind rules and confirm the target attribute cannot be set to an empty value, or add an explicit authmethod restriction to the ACI to prevent anonymous binds from satisfying the check. Where anonymous binds are not required, disabling anonymous access to the directory removes the attack surface entirely.

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History

Mon, 07 Sep 2026 13:30:00 +0000

Type Values Removed Values Added
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.
Title 389-ds-base: 389-ds: anonymous ldap client can defeat selfdn aci bind-rule checks via empty bind dn
First Time appeared Redhat
Redhat directory Server
Redhat enterprise Linux
Weaknesses CWE-863
CPEs cpe:/a:redhat:directory_server:11
cpe:/a:redhat:directory_server:12
cpe:/a:redhat:directory_server:13
cpe:/o:redhat:enterprise_linux:10
cpe:/o:redhat:enterprise_linux:6
cpe:/o:redhat:enterprise_linux:7
cpe:/o:redhat:enterprise_linux:8
cpe:/o:redhat:enterprise_linux:9
Vendors & Products Redhat
Redhat directory Server
Redhat enterprise Linux
References
Metrics cvssV3_1

{'score': 7.5, 'vector': 'CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:H/A:N'}


Subscriptions

Redhat Directory Server Enterprise Linux
cve-icon MITRE

Status: PUBLISHED

Assigner: redhat

Published:

Updated: 2026-09-07T13:18:09.643Z

Reserved: 2026-08-19T13:01:16.163Z

Link: CVE-2026-76560

cve-icon Vulnrichment

No data.

cve-icon NVD

Status : Received

Published: 2026-09-07T14:16:54.197

Modified: 2026-09-07T14:16:54.197

Link: CVE-2026-76560

cve-icon Redhat

No data.

cve-icon OpenCVE Enrichment

No data.

Weaknesses