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Fencer Vulns
medium 5.4

CVE-2026-16071 json

Keycloak-services: keycloak-services: ldap entry-dn user search bypasses configured users dn boundary

published 2026-08-05 3 mo ago modified 2026-09-08 2 mo ago also BIT-keycloak-2026-16071 , EUVD-2026-53383

cvss
5.4
version 3.1, CNA
cisa kev
Not listed
not in CISA's catalog
epss
0.3%
EPSS 0.3% chance of exploitation in 30 days, percentile 24%
public exploits
0
none known

Summary

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.

Patch / fix

  • bitnami keycloak 26.4.14, 26.6.5
  • Red Hat Red Hat build of Keycloak 26.4 26.4-22, 26.4.14-1
  • Red Hat Red Hat build of Keycloak 26.6 26.6-11, 26.6.5-1

Vendor advisories

What the vendors themselves say about their products: affected, fixed or not affected, and what to do.

red hat product security vex CVE-2026-16071 updated cvss 5.4

keycloak-services: keycloak-services: LDAP entry-DN user search bypasses configured users DN boundary

  • Red Hat build of Keycloak 26.4 rhbk/keycloak-rhel9 26.4-22, rhbk/keycloak-rhel9-operator 26.4-22, rhbk/keycloak-operator-bundle 26.4.14-1
    fixed: vendor fix RHSA-2026:50847
  • Red Hat build of Keycloak 26.4.14
    fixed: vendor fix RHSA-2026:50846
  • Red Hat build of Keycloak 26.6 rhbk/keycloak-rhel9 26.6-11, rhbk/keycloak-rhel9-operator 26.6-11, rhbk/keycloak-operator-bundle 26.6.5-1
    fixed: vendor fix RHSA-2026:50849
  • Red Hat build of Keycloak 26.6.5
    fixed: vendor fix RHSA-2026:50848
  • Red Hat Data Grid 8 keycloak-services 23.0.7 Red Hat JBoss Enterprise Application Platform Expansion Pack keycloak-services 23.0.7 Red Hat Single Sign-On 7 keycloak-services 23.0.7
    not affected: vulnerable code not present

Red Hat CSAF VEX © Red Hat, Inc., from https://security.access.redhat.com/data/csaf/v2/vex/; changed: reduced to product statuses and remediations. CC BY 4.0 · csaf

CISA SSVC

Exploitation
none
Automatable
no
Technical impact
partial
Assessed
3 mo ago

Exploit prediction

0.32% chance of exploitation in the next 30 days, higher than 24% of all scored CVEs (FIRST EPSS, 2026-11-08).

CVSS scores

assigned by version score vector
CNA 3.1 5.4 CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:L/I:L/A:N
OSV 3.1 5.4 CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:L/I:L/A:N

Affected packages

ecosystem package affected fixed in
bitnami keycloak
>=26.4.0, <26.4.14
>=26.6.0, <26.6.5
26.4.14
26.6.5

Affected products

  • Red Hat Red Hat build of Keycloak 26.4
  • Red Hat Red Hat build of Keycloak 26.4.14
  • Red Hat Red Hat build of Keycloak 26.6
  • Red Hat Red Hat build of Keycloak 26.6.5
  • Red Hat Red Hat Data Grid 8
  • Red Hat Red Hat JBoss Enterprise Application Platform Expansion Pack
  • Red Hat Red Hat Single Sign-On 7

Classification

Weakness
  • CWE-90 Improper Neutralization of Special Elements used in an LDAP Query
  • CWE-269 Improper Privilege Management

References

Sources

Fencer Vulns keeps one entry per vulnerability: the CVE id wins, then GHSA, and records that alias each other are merged, except that two CVEs always keep separate entries. The same data is available as JSON.