Vulnerability · Published Mar 11, 2026 · Assigned by redhat
CVE-2026-3911Org.keycloak.services.resources.admin.userresource: keycloak: information disclosure of disabled user attributes via administrative endpoint
Low 2.7
In plain English
A low-severity security flaw in Red Hat build of Keycloak 26.4 from Red Hat. There are no confirmed reports of exploitation so far. The chance it is exploited in the next 30 days is estimated at 0.4% (higher than 31% of all known vulnerabilities).
Severity (CVSS 3.1)2.7Low
Exploit odds (30 days)0.4%top 69.0% of all CVEs
Exploited in the wildNo reportsCISA SSVC: none
Attack toolingNoneno public tooling known
Official description
A 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.
Affected packages & fixed versions
| Ecosystem | Package | Fixed in | Advisory |
|---|---|---|---|
| Maven | org.keycloak:keycloak-services | no fix listed | GHSA-xh32-c9wx-phrp |
Affected products (as reported)
| Vendor | Product | Versions |
|---|---|---|
| Red Hat | Red Hat build of Keycloak 26.4 | see references |
| Red Hat | Red Hat build of Keycloak 26.4 | see references |
| Red Hat | Red Hat build of Keycloak 26.4 | see references |
| Red Hat | Red Hat build of Keycloak 26.4.11 | see references |
Weakness: CWE-359 · Vector: CVSS:3.1/AV:N/AC:L/PR:H/UI:N/S:U/C:L/I:N/A:N
References
- RHSA-2026:6477 vendor-advisory, x_refsource_REDHAT
- RHSA-2026:6478 vendor-advisory, x_refsource_REDHAT
- https://access.redhat.com/security/cve/CVE-2026-3911 vdb-entry, x_refsource_REDHAT
- RHBZ#2446392 issue-tracking, x_refsource_REDHAT