Monitor vulnerabilities like this one.
Sign up free to get alerted when software you use is affected.
2.7
Keycloak: Unauthorized access to hidden user data
CVE-2026-3911
GHSA-xh32-c9wx-phrp
Summary
An authenticated user with administrative privileges can access sensitive user data that's meant to be hidden. This affects Keycloak installations where users have the 'view-users' role. Update Keycloak to the latest version to prevent unauthorized data exposure.
What to do
No fix is available yet. Check with your software vendor for updates.
Affected software
| Vendor | Product | Affected versions | Fix available |
|---|---|---|---|
| – | org.keycloak:keycloak-services | <= 26.5.5 | – |
Original title
Keycloak: Information disclosure of disabled user attributes via administrative endpoint
Original 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.
nvd CVSS3.1
2.7
Vulnerability type
CWE-359
- https://access.redhat.com/security/cve/CVE-2026-3911
- https://bugzilla.redhat.com/show_bug.cgi?id=2446392
- https://nvd.nist.gov/vuln/detail/CVE-2026-3911
- https://github.com/keycloak/keycloak/issues/46922
- https://github.com/keycloak/keycloak/pull/46923
- https://github.com/keycloak/keycloak/commit/215bc1e27230f2a66670ed70262248b5f525...
- https://github.com/advisories/GHSA-xh32-c9wx-phrp
Published: 11 Mar 2026 · Updated: 13 Mar 2026 · First seen: 11 Mar 2026