CVEvulnerability
CVE-2026-1035
3.1 LOW
Official page ↗
- Status
- Deferred
- Published
- 2026-01-21
- Last modified
- 2026-06-17
- Assigner
- [email protected]
- CVSS 3.1 ([email protected])
- 3.1 LOW — CVSS:3.1/AV:N/AC:H/PR:L/UI:N/S:U/C:N/I:L/A:N
- Weaknesses
- CWE-367
Description
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.
Related
Weakness · CWE (1)
- CWE-367 Time-of-check Time-of-use (TOCTOU) Race Condition weakness
References
- https://access.redhat.com/errata/RHSA-2026:6477 access.redhat.com
- https://access.redhat.com/errata/RHSA-2026:6478 access.redhat.com
- https://access.redhat.com/security/cve/CVE-2026-1035 access.redhat.com
- https://bugzilla.redhat.com/show_bug.cgi?id=2430314 bugzilla.redhat.com