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.

INFO

Published Date :

2026-01-21T05:52:22.495Z

Last Modified :

2026-04-02T16:47:18.487Z

Source :

redhat
AFFECTED PRODUCTS

The following products are affected by CVE-2026-1035 vulnerability.

Vendors Products
Redhat
  • Build Keycloak
  • Jboss Enterprise Application Platform
  • Jbosseapxp
  • Red Hat Single Sign On
REFERENCES

Here, you will find a curated list of external links that provide in-depth information to CVE-2026-1035.

URL Resource
https://access.redhat.com/errata/RHSA-2026:6477 cve-icon cve-icon
https://access.redhat.com/errata/RHSA-2026:6478 cve-icon cve-icon
https://access.redhat.com/security/cve/CVE-2026-1035 cve-icon cve-icon
https://bugzilla.redhat.com/show_bug.cgi?id=2430314 cve-icon cve-icon
https://nvd.nist.gov/vuln/detail/CVE-2026-1035 cve-icon
https://www.cve.org/CVERecord?id=CVE-2026-1035 cve-icon
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