CVE-2026-1035

No fix known EPSS <1%CVSS 3.1

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.

Published 2026-01-21 · CVE record · OSV

Products: Red Hat build of Keycloak 26.4, Red Hat build of Keycloak 26.4.11, Red Hat JBoss Enterprise Application Platform 8, Red Hat JBoss Enterprise Application Platform Expansion Pack, Red Hat Single Sign-On 7

Fixed upstream

Distro releases