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.
Problem types
URL Redirection to Untrusted Site ('Open Redirect')
Product status
26.2.15-1 (rpm) before *
26.2-18 (rpm) before *
26.2-18 (rpm) before *
26.4.11-1 (rpm) before *
26.4-14 (rpm) before *
26.4-14 (rpm) before *
Timeline
| 2026-03-10: | Reported to Red Hat. |
| 2026-04-02: | Made public. |
Credits
Red Hat would like to thank Meeranh for reporting this issue.
References
access.redhat.com/errata/RHSA-2026:6475 (RHSA-2026:6475)
access.redhat.com/errata/RHSA-2026:6476 (RHSA-2026:6476)
access.redhat.com/errata/RHSA-2026:6477 (RHSA-2026:6477)
access.redhat.com/errata/RHSA-2026:6478 (RHSA-2026:6478)
access.redhat.com/security/cve/CVE-2026-3872
bugzilla.redhat.com/show_bug.cgi?id=2445988 (RHBZ#2445988)