CVE-2026-4633

Name: CVE-2026-4633
Creator: NVD / NIST
Published: 2026-03-23T11:16:25.053+00:00
License: https://creativecommons.org/publicdomain/zero/1.0/

LOWCVSS 3.7/10EPSS 0.32%

Last modified Jun 17, 2026

CVE-2026-4633 is a low-severity vulnerability rated 3.7/10 on the CVSS scale. A flaw was found in Keycloak. A remote attacker can exploit differential error messages during the identity-first login flow when Organizations are enabled. EPSS estimates a 0.32% chance of exploitation in the next 30 days.

Description

A flaw was found in Keycloak. A remote attacker can exploit differential error messages during the identity-first login flow when Organizations are enabled. This vulnerability allows an attacker to determine the existence of users, leading to information disclosure through user enumeration.

Metrics

CVSS 3.1

3.7/10

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

EPSS Probability

0.32%

23.6th percentile

Probability of exploitation in the next 30 days. Learn more

Weakness Enumeration

CWE-209

Affected Software

Vendor	Product	Versions
Redhat	Build Of Keycloak	All versions

References

https://access.redhat.com/security/cve/CVE-2026-4633Vendor Advisory
https://bugzilla.redhat.com/show_bug.cgi?id=2450247Exploit, Issue Tracking, Vendor Advisory

Timeline

Published: Mar 23, 2026
Last Modified: Jun 17, 2026
Status: Analyzed

Frequently Asked Questions

What is CVE-2026-4633?

How severe is CVE-2026-4633?

CVE-2026-4633 has a CVSS score of 3.7/10 (LOW severity). The EPSS model estimates a 0.32% probability of exploitation in the next 30 days.

How do I fix CVE-2026-4633?

Check the vendor references and advisories linked above for patched versions and mitigation guidance. You can also run a Strix scan to test if your systems are affected.

Are you affected by CVE-2026-4633?

Run a free Strix scan to check your systems for this vulnerability.

Scan your code now

Source: NVD / NIST