CVE-2026-97174
Last modified
CVE-2026-97174 is a medium-severity vulnerability rated 6.8/10 on the CVSS scale. 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.
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.
Metrics
Weakness Enumeration
Affected Software
Source: CNA advisory (CVE.org). NVD analysis pending.
| Vendor | Product | Versions |
|---|---|---|
| Red Hat | Red Hat Build of Keycloak | All versions |
References
Timeline
- Published
- Last Modified
- Status
- Awaiting Analysis
Frequently Asked Questions
What is CVE-2026-97174?
How severe is CVE-2026-97174?
How do I fix CVE-2026-97174?
How Strix Helps
- How Strix found a critical auth bypass in etcdStrix autonomously discovered a critical authentication bypass in etcd, later designated CVE-2026-33413.
- Autonomous PentestingAI agents that find and validate exploitable vulnerabilities like this one across your applications.
- PR ReviewsPentest every pull request so vulnerable code is caught before it ships to production.
- AI Penetration TestingHow AI-driven penetration testing continuously covers your attack surface.
Related CVEs from 2026
- CVE-2026-97162Joomla Extension - lomart.fr - Various SQL injection vectors…9.8
- CVE-2026-97163Joomla Extension - lomart.fr - Unauthenticated remote code i…9.8
- CVE-2026-97164Joomla Extension - svenbluege.de - Authenticated arbitrary p…8.1
- CVE-2026-97165Joomla Extension - svenbluege.de - Reflected XSS and open re…6.1
- CVE-2026-97168Rejected reason: it is a suggestion
- CVE-2026-9717CWE-78 Neutralization of Special Elements used in an OS Comm…7.2
- CVE-2026-97175A flaw was found in the idp-auto-link authenticator of the k…8.8
- CVE-2026-97176A flaw was found in the Level of Authentication enforcement …4.2
- CVE-2026-97177A flaw was found in the user update mechanism of the Keycloa…6.6
- CVE-2026-97179A security vulnerability has been detected in O2OA up to 9.5…4.3
- CVE-2026-9718CWE-617 Reachable Assertion vulnerability exists that could …6.5
- CVE-2026-97181GPM LIGHT developed by ezGlobal has a Sensitive Data Exposur…5.3
Are you affected by CVE-2026-97174?
Run a free Strix scan to check your systems for this vulnerability.
Scan your code nowSource: NVD / NIST