CVE-2026-109082: Improper Authentication in Red Hat Red Hat Build of Keycloak
Description
A flaw was found in the Client-Initiated Backchannel Authentication CIBA implementation within the keycloak-services component of Keycloak. This component handles advanced authentication flows where a client initiates a login on behalf of a user. The issue occurs because Keycloak fails to verify that a client is authorized to use the CIBA flow, allowing public clients to bypass security requirements. An attacker could use this flaw to trick a user into approving a login request, eventually gaining full access to the users account without needing a client secret.
CVSS v3.1
Score 6.8medium
Affected software
Red Hat
Red Hat Build of Keycloak
Red Hat
Red Hat Single Sign-On 7
AI-Powered Analysis
Machine-generated threat intelligence
Technical Analysis
This vulnerability exists in the CIBA implementation of the keycloak-services component in Red Hat Build of Keycloak. The issue arises because Keycloak fails to verify whether a client is authorized to use the CIBA flow, which is intended for advanced authentication scenarios where a client initiates login on behalf of a user. Due to this lack of verification, public clients can bypass security requirements, potentially allowing an attacker to deceive a user into approving a login request and thereby gain full account access without possessing the client secret.
Potential Impact
Successful exploitation allows an attacker to gain full access to a user's account by tricking the user into approving a login request. This bypasses the intended security controls of the CIBA flow, compromising confidentiality and integrity of the affected accounts. The vulnerability does not affect availability.
Mitigation Recommendations
Patch status is not yet confirmed — check the Red Hat advisory at https://access.redhat.com/security/cve/CVE-2026-109082 for current remediation guidance. Until an official fix is available, restrict use of public clients with CIBA flow or disable CIBA if not required.
Technical Details
- Data Version
- 5.2
- Assigner Short Name
- redhat
- Date Reserved
- 2026-10-12T06:09:06.647Z
- Cvss Version
- 3.1
- State
- PUBLISHED
- Vendor Advisory Urls
- [{"url":"https://access.redhat.com/security/cve/CVE-2026-109082","vendor":"Red Hat"}]
Threat ID: 6acc86862cdf04f6566ec6fe
Added to database: 10/12/2026, 07:04:38 UTC
Last enriched: 10/12/2026, 07:18:56 UTC
Last updated: 10/12/2026, 18:57:56 UTC
Views: 18
Community Reviews
0 reviewsCrowdsource mitigation strategies, share intel context, and vote on the most helpful responses. Sign in to add your voice and help keep defenders ahead.
Want to contribute mitigation steps or threat intel context? Sign in or create an account to join the community discussion.
Actions
Updates to AI analysis require Pro Console access. Upgrade inside Console → Billing.
Need more coverage?
Upgrade to Pro Console for AI refresh and higher limits.
For incident response and remediation, OffSeq services can help resolve threats faster.
Latest Threats
Check if your credentials are on the dark web
Instant breach scanning across billions of leaked records. Free tier available.