CVE-2026-1035 - Org.keycloak.protocol.oidc: keycloak refresh token reuse bypass via toctou race c...

CVE ID : CVE-2026-1035 Published : Jan. 21, 2026, 6:15 a.m. | 56 minutes ago 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. Severity: 3.1 | LOW Visit the link for more details, such as CVSS details, affected products, timeline, and more...