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Description

A flaw was found in Keycloak's client registration service. A remote attacker, possessing a previously issued Registration Access Token (RAT), could exploit this vulnerability to re-enable a client that an administrator had explicitly disabled. This bypasses security controls, allowing the attacker to reset the client's secret and potentially regain privileged API access. The primary impact includes unauthorized information disclosure and potential integrity compromise.

PUBLISHED Reserved 2026-05-27 | Published 2026-06-25 | Updated 2026-06-26 | Assigner redhat




MEDIUM: 6.5CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:L/I:L/A:N

Problem types

Insufficient Session Expiration

Product status

Default status
affected

26.4.13-1 (rpm) before *
unaffected

Default status
affected

26.4-19 (rpm) before *
unaffected

Default status
affected

26.4-19 (rpm) before *
unaffected

Default status
unaffected

Default status
affected

26.6.4-2 (rpm) before *
unaffected

Default status
affected

26.6-8 (rpm) before *
unaffected

Default status
affected

26.6-8 (rpm) before *
unaffected

Default status
unaffected

Timeline

2026-05-27:Reported to Red Hat.
2026-06-25:Made public.

Credits

Red Hat would like to thank Qiulin Deng for reporting this issue.

References

access.redhat.com/errata/RHSA-2026:30049 (RHSA-2026:30049) vendor-advisory

access.redhat.com/errata/RHSA-2026:30050 (RHSA-2026:30050) vendor-advisory

access.redhat.com/errata/RHSA-2026:30083 (RHSA-2026:30083) vendor-advisory

access.redhat.com/errata/RHSA-2026:30084 (RHSA-2026:30084) vendor-advisory

access.redhat.com/security/cve/CVE-2026-9705 vdb-entry

bugzilla.redhat.com/show_bug.cgi?id=2481878 (RHBZ#2481878) issue-tracking

cve.org (CVE-2026-9705)

nvd.nist.gov (CVE-2026-9705)

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