CVE-2026-1035

LOW EPSS 19.9%

Published Jan 21, 20265mo ago · Modified Jun 17, 20262w ago

3.1 CVSS 3.1

Low

Published Jan 21, 2026 5mo ago

Last Modified Jun 17, 2026 2w 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.

CVSS Details

Base Score

3.1

Exploitability

1.6

Impact

1.4

Vector string

CVSS:3.1/AV:N/AC:H/PR:L/UI:N/S:U/C:N/I:L/A:N

Attack Vector Network

Attack Complexity High

Privileges Required Low

User Interaction None

Scope Unchanged

Confidentiality None

Integrity Low

Availability None

Threat Intelligence

EPSS Exploit Probability

19.9% percentile

Exploit & Patch Status

No Known Exploit

No Patch Available

Weaknesses 1

CWE-367

References 4

access.redhat.com 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
bugzilla.redhat.com https://bugzilla.redhat.com/show_bug.cgi?id=2430314

Remediation

No remediation data recorded yet

Check vendor advisories and the NVD entry for patch availability.