Description (CNA)
A flaw was found in the Keycloak server during refresh token processing, specifically in the TokenManager class responsible for enforcing refresh token reuse policies. When strict refresh token rotation is enabled, the validation and update of refresh token usage are not performed atomically. This allows concurrent refresh requests to bypass single-use enforcement and issue multiple access tokens from the same refresh token. As a result, Keycloak’s refresh token rotation hardening can be undermined.
Affected (CNA)
| Vendor / product | Versions |
|---|---|
| Red Hat / Red Hat build of Keycloak 26.4 | unaffected 26.4.11-1 before * |
| Red Hat / Red Hat build of Keycloak 26.4 | unaffected 26.4-14 before * |
| Red Hat / Red Hat build of Keycloak 26.4 | unaffected 26.4-14 before * |
| Red Hat / Red Hat build of Keycloak 26.4.11 | unaffected |
| Red Hat / Red Hat JBoss Enterprise Application Platform 8 | unaffected |
| Red Hat / Red Hat JBoss Enterprise Application Platform Expansion Pack | unaffected |
| Red Hat / Red Hat Single Sign-On 7 | unaffected |
CWE
CWE-367
References
- https://access.redhat.com/errata/RHSA-2026:6477
- https://access.redhat.com/errata/RHSA-2026:6478
- https://access.redhat.com/security/cve/CVE-2026-1035
- https://bugzilla.redhat.com/show_bug.cgi?id=2430314
ADP enrichment
No English description supplied.
No references supplied.