CVE-2026-4633
Low
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.
SeverityLow
CVSS3.7
Exploit probability—
Product
Redhat Build Of Keycloak
PublishedMar 23, 2026
First seenMar 23, 2026
Weakness typeCWE-209CWE-209
How to fix
Update
- org.keycloak:keycloak-services26.6.1, 26.4.12 or later
Vendor advisories
Affected products
| Product | Affected versions | Fixed in |
|---|---|---|
| redhat build_of_keycloak | No range specified | — |
| org.keycloak:keycloak-servicesMaven | 26.5.0 ≤ v < 26.6.1, v < 26.4.12 | 26.6.1, 26.4.12 |
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