Description (CNA)
A flaw was found in the legacy client-initiated account-linking endpoint of Keycloak, a widely used open-source identity and access management solution. The mechanism used to protect the account-linking process from unauthorized requests relies on a hash that can be predicted by a malicious OIDC client. By tricking a user into authenticating, an attacker-controlled client can forge a valid linking URL to connect the victim's account to an attacker's external identity. This results in a full account takeover, allowing the attacker to log in as the victim.
Affected (CNA)
| Vendor / product | Versions |
|---|---|
| Red Hat / Red Hat build of Keycloak 26.6 | unaffected 26.6.6-1 before * |
| Red Hat / Red Hat build of Keycloak 26.6 | unaffected 26.6-12 before * |
| Red Hat / Red Hat build of Keycloak 26.6 | unaffected 26.6-12 before * |
| Red Hat / Red Hat build of Keycloak 26.6.6 | unaffected |
| Red Hat / Red Hat build of Keycloak 26.6.6 | unaffected |
| Red Hat / Red Hat build of Keycloak 26.6.6 | unaffected |
| Red Hat / Red Hat Data Grid 8 | unaffected |
| Red Hat / Red Hat JBoss Enterprise Application Platform Expansion Pack | unaffected |
| Red Hat / Red Hat Single Sign-On 7 | unaffected |
CWE
CWE-341
References
- https://access.redhat.com/errata/RHSA-2026:56523
- https://access.redhat.com/errata/RHSA-2026:56524
- https://access.redhat.com/security/cve/CVE-2026-15571
- https://bugzilla.redhat.com/show_bug.cgi?id=2499591
ADP enrichment
No English description supplied.
No references supplied.