Medium severity · published Jul 17, 2026
CVE-2026-16104
Keycloak-services: keycloak-services: authenticator config endpoint exposes raw recaptcha secrets to view-only admins
6.5
CVSS
0.5%
EPSS
No
On KEV
Description
A flaw was found in the authentication configuration endpoint of the keycloak-services component, which is the core engine for Red Hat Build of Keycloak identity and access management. The issue occurs because the system fails to mask sensitive configuration values, such as reCAPTCHA secret keys, when they are requested by administrators with view-only permissions. This can lead to the exposure of third-party service credentials to unauthorized personnel or through administrative logs.
CVSS vector
CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:N/A:N
Attack vector
Network
Complexity
Low
Privileges
Low
User interaction
None
Confidentiality
High
Integrity
None
Availability
None
Scope
Unchanged
Exploitation
Is it being used?
Exploit prediction (EPSS)0.5% · higher than 39% of CVEs
Exploited in the wildNo evidence yet
CISA KEVNot listed
Ransomware campaign useNot known
Affected products
Which versions
RH
Red Hat build of Keycloak 26.6 · Red Hat
All versions, or not specified · source: vendor
BO
Build OF Keycloak · Redhat
All versions, or not specified · source: NVD
References
NVD
https://nvd.nist.gov/vuln/detail/CVE-2026-16104
CVE.org
https://www.cve.org/CVERecord?id=CVE-2026-16104
access.redhat.com
https://access.redhat.com/errata/RHSA-2026:68277
access.redhat.com
https://access.redhat.com/errata/RHSA-2026:68278
Vendor Advisory
https://access.redhat.com/security/cve/CVE-2026-16104
Issue Tracking
https://bugzilla.redhat.com/show_bug.cgi?id=2501737
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