CVE-2026-16071
Keycloak-services: keycloak-services: ldap entry-dn user search bypasses configured users dn boundary
CVSS Score
5.4
EPSS Score
0.0%
EPSS Percentile
0th
A flaw was found in the LDAP storage provider of Keycloak, which is used to federate user identities from external directories. The issue occurs when a delegated administrator performs a search using a specific LDAP entry Distinguished Name (DN). Due to missing validation, the system allows lookups for users located outside the configured search boundary, leading to the disclosure of account information from unauthorized parts of the directory and unintended importing of those users into local storage.
| Vendor | red hat |
| Product | red hat build of keycloak 26.4 |
| Published | Aug 5, 2026 |
| Last Updated | Aug 6, 2026 |
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CVSS v3 Breakdown
CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:L/I:L/A:N Attack Vector
Network
Attack Complexity
Low
Privileges Required
Low
User Interaction
None
Scope
Unchanged
Confidentiality
Low
Integrity
Low
Availability
None
Affected Versions
Red Hat / Red Hat build of Keycloak 26.4
All versions affected Red Hat / Red Hat build of Keycloak 26.4
All versions affected Red Hat / Red Hat build of Keycloak 26.4
All versions affected Red Hat / Red Hat build of Keycloak 26.4.14
All versions affected Red Hat / Red Hat build of Keycloak 26.4.14
All versions affected Red Hat / Red Hat build of Keycloak 26.6
All versions affected Red Hat / Red Hat build of Keycloak 26.6
All versions affected Red Hat / Red Hat build of Keycloak 26.6
All versions affected Red Hat / Red Hat build of Keycloak 26.6.5
All versions affected Red Hat / Red Hat build of Keycloak 26.6.5
All versions affected Red Hat / Red Hat build of Keycloak 26.6.5
All versions affected Red Hat / Red Hat Data Grid 8
All versions affected Red Hat / Red Hat JBoss Enterprise Application Platform Expansion Pack
All versions affected Red Hat / Red Hat Single Sign-On 7
All versions affected References
access.redhat.com: https://access.redhat.com/errata/RHSA-2026:50846 access.redhat.com: https://access.redhat.com/errata/RHSA-2026:50847 access.redhat.com: https://access.redhat.com/errata/RHSA-2026:50848 access.redhat.com: https://access.redhat.com/errata/RHSA-2026:50849 access.redhat.com: https://access.redhat.com/security/cve/CVE-2026-16071 bugzilla.redhat.com: https://bugzilla.redhat.com/show_bug.cgi?id=2501720
Credits
Red Hat would like to thank Paul Bottinelli (Trail of Bits) for reporting this issue.