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Mitigation for this issue is either not available or the currently available options do not meet the Red Hat Product Security criteria comprising ease of use and deployment, applicability to widespread installation base, or stability.
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Thu, 05 Nov 2026 17:30:00 +0000
| Type | Values Removed | Values Added |
|---|---|---|
| Description | A flaw was found in the Client-Initiated Backchannel Authentication (CIBA) implementation of Keycloak. The CIBA endpoint fails to properly validate the sub parameter, allowing it to be stored as an additional request parameter. During the token issuance process, this injected value overwrites the legitimate subject identifier. This allows an attacker to authenticate as themselves but receive security tokens belonging to a different victim user, leading to unauthorized account access. | |
| Title | Keycloak-services: keycloak-services: ciba sub parameter injection causes attacker authentication to issue victim tokens | |
| First Time appeared |
Redhat
Redhat build Keycloak Redhat red Hat Single Sign On |
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| Weaknesses | CWE-20 | |
| CPEs | cpe:/a:redhat:build_keycloak: cpe:/a:redhat:red_hat_single_sign_on:7 |
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| Vendors & Products |
Redhat
Redhat build Keycloak Redhat red Hat Single Sign On |
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| References |
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| Metrics |
cvssV3_1
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Status: PUBLISHED
Assigner: redhat
Published:
Updated: 2026-11-05T20:58:34.387Z
Reserved: 2026-09-24T05:29:37.511Z
Link: CVE-2026-97174
No data.
Status : Awaiting Analysis
Published: 2026-11-05T18:17:11.493
Modified: 2026-11-05T21:18:54.650
Link: CVE-2026-97174
No data.
OpenCVE Enrichment
Updated: 2026-11-05T21:00:21Z
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CWE-20
Improper Input Validation