Org.keycloak.services.resources.admin.userresource: keycloak: information disclosure of disabled user attributes via administrative endpoint

MITRE NVD CVE.ORG JSON API Print: PDF PDF

Summary

CVECVE-2026-3911
StatePUBLISHED
Assignerredhat
Source PriorityCVE Program / NVD first with legacy fallback
Published2026-03-11 06:17:15 UTC
Updated2026-05-07 18:30:50 UTC
DescriptionA flaw was found in Keycloak. An authenticated user with the view-users role could exploit a vulnerability in the UserResource component. By accessing a specific administrative endpoint, this user could improperly retrieve user attributes that were configured to be hidden. This unauthorized information disclosure could expose sensitive user data.

Risk And Classification

Primary CVSS: v3.1 2.7 LOW from [email protected]

CVSS:3.1/AV:N/AC:L/PR:H/UI:N/S:U/C:L/I:N/A:N

EPSS: 0.000120000 probability, percentile 0.017560000 (date 2026-05-12)

Problem Types: CWE-359 | NVD-CWE-noinfo | CWE-359 Exposure of Private Personal Information to an Unauthorized Actor

VersionSourceTypeScoreSeverityVector
3.1[email protected]Secondary2.7LOWCVSS:3.1/AV:N/AC:L/PR:H/UI:N/S:U/C:L/I:N/A:N
3.1CNACVSS2.7LOWCVSS:3.1/AV:N/AC:L/PR:H/UI:N/S:U/C:L/I:N/A:N

CVSS v3.1 Breakdown

Attack Vector
Network
Attack Complexity
Low
Privileges Required
High
User Interaction
None
Scope
Unchanged
Confidentiality
Low
Integrity
None
Availability
None

CVSS:3.1/AV:N/AC:L/PR:H/UI:N/S:U/C:L/I:N/A:N

NVD Known Affected Configurations (CPE 2.3)

TypeVendorProductVersionUpdateEditionLanguage
Application Redhat Build Of Keycloak - All All All
Application Redhat Build Of Keycloak 26.4 All All All
Application Redhat Build Of Keycloak 26.4.11 All All All

Vendor Declared Affected Products

SourceVendorProductVersionPlatforms
CNA Red Hat Red Hat Build Of Keycloak 26.4 unaffected 26.4.11-1 * rpm Not specified
CNA Red Hat Red Hat Build Of Keycloak 26.4 unaffected 26.4-14 * rpm Not specified
CNA Red Hat Red Hat Build Of Keycloak 26.4 unaffected 26.4-14 * rpm Not specified
CNA Red Hat Red Hat Build Of Keycloak 26.4.11 Not specified Not specified

References

ReferenceSourceLinkTags
access.redhat.com/errata/RHSA-2026:6478 [email protected] access.redhat.com Vendor Advisory
access.redhat.com/security/cve/CVE-2026-3911 [email protected] access.redhat.com Vendor Advisory
bugzilla.redhat.com/show_bug.cgi [email protected] bugzilla.redhat.com Issue Tracking
access.redhat.com/errata/RHSA-2026:6477 [email protected] access.redhat.com Vendor Advisory
CVE Program record CVE.ORG www.cve.org canonical
NVD vulnerability detail NVD nvd.nist.gov canonical, analysis

Vendor Comments And Credit

Discovery Credit

CNA: Red Hat would like to thank drak3hft7 for reporting this issue. (en)

Additional Advisory Data

SourceTimeEvent
CNA2026-03-11T03:30:01.455ZReported to Red Hat.
CNA2026-03-11T03:30:00.000ZMade public.

Workarounds

CNA: Mitigation for this issue is either not available or the currently available options do not meet the Red Hat Product Security criteria comprising ease of use and deployment, applicability to widespread installation base, or stability.

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