CVE-2026-1035
Published: Jan 21, 2026
Modified: Apr 2, 2026
CVSS v3.1
3.1
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.
| Vendor | Product | Versions |
|---|---|---|
Red Hat | Red Hat build of Keycloak 26.4 | unaffected 26.4.11-1 - < * |
Red Hat | Red Hat build of Keycloak 26.4 | unaffected 26.4-14 - < * |
Red Hat | Red Hat build of Keycloak 26.4 | unaffected 26.4-14 - < * |
Red Hat | Red Hat build of Keycloak 26.4.11 | All versions |
Red Hat | Red Hat JBoss Enterprise Application Platform 8 | All versions |
Red Hat | Red Hat JBoss Enterprise Application Platform Expansion Pack | All versions |
Red Hat | Red Hat Single Sign-On 7 | All versions |
Weaknesses (CWE)
CVSS v3.1 Details
CVSS v3.1 Vector
CVSS:3.1/AV:N/AC:H/PR:L/UI:N/S:U/C:N/I:L/A:N
Attack Vector
Attack Complexity
Privileges Required
User Interaction
Scope
Confidentiality
Integrity
Availability
References
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