Vulnerability in Red Hat Build Of Keycloak 26.4
CVE-2026-3911
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.
Published · last modified .
CVSS v3 metric
CVSS v3 base score 2.7 (Low). Vector: CVSS:3.1/AV:N/AC:L/PR:H/UI:N/S:U/C:L/I:N/A:N.
EPSS exploit prediction
EPSS: 0.004 (30.9th percentile), scored .
Very low probability of exploitation in the next 30 days; routine patching cadence is appropriate. 31st percentile — 30.9% of CVEs in the catalogue have a lower EPSS than this one. How to read EPSS.
EPSS over last 30 days · oldest: 0.003 · newest: 0.004 · change: +0.001
Affected products
- Red Hat Build Of Keycloak 26.4 — versions 26.4.11-1, 26.4-14
- Red Hat Build Of Keycloak 26.4.11
- Red Hat Build Of Keycloak — versions 26.4, 26.4.11
Weakness classification (CWE)
References
- access.redhat.com/errata/RHSA-2026:6477 (vendor-advisory, Vendor Advisory)
- access.redhat.com/errata/RHSA-2026:6478 (vendor-advisory, Vendor Advisory)
- access.redhat.com/security/cve/CVE-2026-3911 (vdb-entry, Vendor Advisory)
- bugzilla.redhat.com/show_bug.cgi (issue-tracking, Issue Tracking)
Frequently asked questions
- What is CVE-2026-3911?
- CVE-2026-3911 is a low-severity vulnerability in Red Hat Build Of Keycloak 26.4, classified under Exposure of Private Personal Information to an Unauthorized Actor. CVSS score: 2.7/10. Published 2026-03-11.
- How severe is CVE-2026-3911?
- Low severity. CVSS v3 base score is 2.7 out of 10.