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.

Tracking

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Advisories

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History

Tue, 08 Sep 2026 08:15:00 +0000

Type Values Removed Values Added
CPEs cpe:/o:redhat:enterprise_linux:10 cpe:/a:redhat:directory_server:11.9::el8
cpe:/a:redhat:directory_server_e4s:12.4::el9
cpe:/a:redhat:rhel_aus:8.6::appstream
cpe:/a:redhat:rhel_eus_long_life:8.6::appstream
cpe:/o:redhat:enterprise_linux:10.2
References

Tue, 08 Sep 2026 06:45:00 +0000

Type Values Removed Values Added
CPEs cpe:/o:redhat:enterprise_linux:9 cpe:/a:redhat:enterprise_linux:9::appstream
cpe:/a:redhat:enterprise_linux:9::crb
References

Tue, 08 Sep 2026 05:30:00 +0000

Type Values Removed Values Added
CPEs cpe:/a:redhat:enterprise_linux:8::appstream
References

Tue, 08 Sep 2026 04:30:00 +0000

Type Values Removed Values Added
First Time appeared Redhat enterprise Linux Eus
Redhat rhel Eus
CPEs cpe:/a:redhat:rhel_eus:9.6::appstream
cpe:/a:redhat:rhel_eus:9.6::crb
cpe:/o:redhat:enterprise_linux_eus:10.0
Vendors & Products Redhat enterprise Linux Eus
Redhat rhel Eus
References

Tue, 08 Sep 2026 03:30:00 +0000

Type Values Removed Values Added
First Time appeared Redhat directory Server E4s
Redhat rhel Aus
Redhat rhel E4s
Redhat rhel Eus Long Life
Redhat rhel Tus
CPEs cpe:/a:redhat:directory_server_e4s:11.7::el8
cpe:/a:redhat:directory_server_e4s:12.2::el9
cpe:/a:redhat:rhel_aus:8.4::appstream
cpe:/a:redhat:rhel_e4s:8.8::appstream
cpe:/a:redhat:rhel_e4s:9.2::appstream
cpe:/a:redhat:rhel_e4s:9.4::appstream
cpe:/a:redhat:rhel_eus_long_life:8.4::appstream
cpe:/a:redhat:rhel_tus:8.8::appstream
Vendors & Products Redhat directory Server E4s
Redhat rhel Aus
Redhat rhel E4s
Redhat rhel Eus Long Life
Redhat rhel Tus
References

Tue, 08 Sep 2026 02:30:00 +0000

Type Values Removed Values Added
First Time appeared Redhat rhel Els
CPEs cpe:/o:redhat:enterprise_linux:7 cpe:/o:redhat:rhel_els:7
Vendors & Products Redhat rhel Els
References

Tue, 08 Sep 2026 00:15:00 +0000

Type Values Removed Values Added
References
Metrics threat_severity

None

threat_severity

Important


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 Directory Server E4s Enterprise Linux Enterprise Linux Eus Rhel Aus Rhel E4s Rhel Els Rhel Eus Rhel Eus Long Life Rhel Tus
cve-icon MITRE

Status: PUBLISHED

Assigner: redhat

Published:

Updated: 2026-09-08T07:57:05.047Z

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: 2026-09-08T08:17:11.830

Link: CVE-2026-76560

cve-icon Redhat

Severity : Important

Publid Date: 2026-09-07T12:00:00Z

Links: CVE-2026-76560 - Bugzilla

cve-icon OpenCVE Enrichment

Updated: 2026-09-07T15:00:14Z

Weaknesses