Description
A flaw was found in Keycloak, where it did not properly check client tokens for possible revocation in its client credential flow. This flaw allows an attacker to access or modify potentially sensitive information.
Affected products
| Vendor | Product | Affected | Fixed |
|---|---|---|---|
| redhat.com | Keycloak | — | — |
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 | 18.0.6-1.redhat_00001.1.el7sso | RHSA-2023:1045, RHSA-2023:1044, RHSA-2023:1043 |
Affected packages
| Ecosystem | Package | Affected | Fixed | Record |
|---|---|---|---|---|
| Maven | org.keycloak:keycloak-core | < 20.0.3 | 20.0.3 | GHSA-v436-q368-hvgg |
Advisories 5
- RHSA-2023:1045 Red Hat Security Advisory: Red Hat Single Sign-On 7.6.2 security update on RHEL 9 Red Hat Security Advisories (RHSA) · Oct 13, 2026
- RHSA-2023:1044 Red Hat Security Advisory: Red Hat Single Sign-On 7.6.2 security update on RHEL 8 Red Hat Security Advisories (RHSA) · Oct 13, 2026
- RHSA-2023:1043 Red Hat Security Advisory: Red Hat Single Sign-On 7.6.2 security update on RHEL 7 Red Hat Security Advisories (RHSA) · Oct 13, 2026
- WID-SEC-2023-0086 Keycloak: Mehrere Schwachstellen BSI CERT-Bund (WID) · Jan 25, 2026
- WID-SEC-2023-0034 Keycloak: Schwachstelle ermöglicht Manipulation von Daten BSI CERT-Bund (WID) · May 22, 2023