Description
A flaw was found in keycloak where a brute force attack is possible even when the permanent lockout feature is enabled. This is due to a wrong error message displayed when wrong credentials are entered. The highest threat from this vulnerability is to confidentiality.
Affected products
| Vendor | Product | Affected | Fixed |
|---|---|---|---|
| — | keycloak | Fixed in keycloak v13.0.0. | — |
Fixed in Linux distributions
Distributions backport fixes, so the version that fixes this vulnerability differs per release — upgrade to at least the version shown. From the distributions' security trackers and advisories.
Red Hat
Security tracker ↗| Release | Package | Fixed in | Advisory |
|---|---|---|---|
| Red Hat Single Sign On 7 | rh-sso7-keycloak +1 | 9.0.15-1.redhat_00002.1.el6sso | RHSA-2021:3529, RHSA-2021:3528, RHSA-2021:3527 |
Affected packages
| Ecosystem | Package | Affected | Fixed | Record |
|---|---|---|---|---|
| Maven | org.keycloak:keycloak-parent | < 13.0.0 | 13.0.0 | GHSA-xv7h-95r7-595j |
Advisories 3
- RHSA-2021:3529 Red Hat Security Advisory: Red Hat Single Sign-On 7.4.9 security update on RHEL 8 Red Hat Security Advisories (RHSA) · Aug 14, 2026
- RHSA-2021:3527 Red Hat Security Advisory: Red Hat Single Sign-On 7.4.9 security update on RHEL 6 Red Hat Security Advisories (RHSA) · Aug 14, 2026
- RHSA-2021:3528 Red Hat Security Advisory: Red Hat Single Sign-On 7.4.9 security update on RHEL 7 Red Hat Security Advisories (RHSA) · Aug 14, 2026