7.3
High
CVE-2026-3872 A flaw was found in Keycloak
Description
A flaw was found in Keycloak. This issue allows an attacker, who controls another path on the same web server, to bypass the allowed path in redirect Uniform Resource Identifiers (URIs) that use a wildcard. A successful attack may lead to the theft of an access token, resulting in information disclosure.
Affected products and versions
| Product | Affected versions | Fixed in |
|---|---|---|
| Red Hat Build of Keycloak | Versions not published | |
| Red Hat build of Keycloak 26.4 26.4 | earliest → < 26.4-14 | 26.4-14 |
| Red Hat build of Keycloak 26.4.11 | Versions not published | |
| Red Hat build of Keycloak 26.2 26.2 | earliest → < 26.2-18 | 26.2-18 |
| Red Hat build of Keycloak 26.2.15 | Versions not published |
References
- RHSA-2026:6475 access.redhat.com
- RHSA-2026:6476 access.redhat.com
- RHSA-2026:6477 access.redhat.com
- RHSA-2026:6478 access.redhat.com
- access.redhat.com access.redhat.com
- RHBZ#2445988 bugzilla.redhat.com
Timeline
- Published
- Last modified
Other CVEs of Red Hat Build of Keycloak
The 275 CVEs of Red Hat Build of Keycloak →
CVE-2026-97848
Keycloak-services: keycloak-services: protocol mapper with jsontype=json bypasses token sanitization
6.5
Medium
CVE-2026-97367
Keycloak-services: keycloak-services: dcr azp and sid claim substitution allows account rest session takeover
6.4
Medium
CVE-2026-96547
Keycloak-services: keycloak-services: dcr registration-time claim-path gap allows forging realm_access.roles
6.5
Medium
CVE-2026-96460
Keycloak-services: keycloak-services: indefinite access token renewal via standard token exchange v2
5.4
Medium