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.
Attack Parameters
Attack Vector
Network
Can be exploited remotely
Attack Complexity
Low
Easy to exploit
Privileges Required
Low
Basic privileges needed
User Interaction
Required
User action required
Impact Assessment
Confidentiality
High
Complete data leak
Integrity
High
Complete data modification
Availability
None
No disruption
CVSS Vector v3.1
Weakness Type (CWE)
Vulnerable Products 5
| Configuration | From (including) | Up to (excluding) |
|---|---|---|
|
Redhat Build_Of_Keycloak
cpe:2.3:a:redhat:build_of_keycloak:-:*:*:*:text-only:*:*:*
|
— | — |
|
Redhat Build_Of_Keycloak
cpe:2.3:a:redhat:build_of_keycloak:26.2:*:*:*:text-only:*:*:*
|
— | — |
|
Redhat Build_Of_Keycloak
cpe:2.3:a:redhat:build_of_keycloak:26.2.15:*:*:*:text-only:*:*:*
|
— | — |
|
Redhat Build_Of_Keycloak
cpe:2.3:a:redhat:build_of_keycloak:26.4:*:*:*:text-only:*:*:*
|
— | — |
|
Redhat Build_Of_Keycloak
cpe:2.3:a:redhat:build_of_keycloak:26.4.11:*:*:*:text-only:*:*:*
|
— | — |
References 6
https://access.redhat.com/errata/RHSA-2026:6475
secalert@redhat.com
https://access.redhat.com/errata/RHSA-2026:6476
secalert@redhat.com
https://access.redhat.com/errata/RHSA-2026:6477
secalert@redhat.com
https://access.redhat.com/errata/RHSA-2026:6478
secalert@redhat.com
https://access.redhat.com/security/cve/CVE-2026-3872
secalert@redhat.com
https://bugzilla.redhat.com/show_bug.cgi?id=2445988
secalert@redhat.com