Sources: National Vulnerability Database, CVE.org, CISA KEV, FIRST EPSS
CVE-2026-112208 Overview
A flaw was found in the Organization identity-first login flow of the Keycloak authentication server. Keycloak is an open-source identity and access management solution used to secure modern applications and services. The issue occurs when an attacker who belongs to multiple organizations initiates a login and then switches to a registration or password reset path. During this process, a flag indicating a successful login is not properly cleared when the user is removed from the session. An attacker can then provide a victim's username, and the system incorrectly treats the stale flag as proof of the victim's identity. This allows the attacker to bypass authentication and gain full access to the victim's account and connected applications.
Critical Impact
Affected Products
- Organization identity-first login flow of the Keycloak authentication server: see the vendor advisory for the exact affected versions
Discovery Timeline
- 2026-11-05: CVE-2026-112208 published to the National Vulnerability Database by secalert@redhat.com
- 2026-11-05: last updated in the NVD database
Technical Details for CVE-2026-112208
Vulnerability Analysis
CVE-2026-112208 is a Security Vulnerability weakness (CWE-305) in Organization identity-first login flow of the Keycloak authentication server. Based on its CVSS vector, the flaw can be reached over the network, needs some level of access, and needs no user interaction.
With a CVSS base score of 8.1, apply the vendor fix and confirm exposure on internet facing and business critical assets first.
Root Cause
The vendor description states: A flaw was found in the Organization identity-first login flow of the Keycloak authentication server. Keycloak is an open-source identity and access management solution used to secure modern applications and services. The issue occurs when an attacker who belongs to multiple organizations initiates a login and then switches to a registration or password reset path. During this process, a flag indicating a successful login is not properly cleared when the user is removed from the session. An attacker can then provide a victim's username, and the system incorrectly treats the stale flag as proof of the victim's identity. This allows the attacker to bypass authentication and gain full access to the victim's account and connected applications.
Attack Vector
Based on the CVSS vector, the flaw can be reached over the network, needs some level of access, and needs no user interaction. Attack complexity is low complexity.
No exploitation in the wild is confirmed by CISA at the time of the last update. Check the references below for any vendor or researcher proof of concept.
CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:N
Detection Methods for CVE-2026-112208
Detection Strategies
- Inventory every instance of Organization identity-first login flow of the Keycloak authentication server and compare the running version with the affected range above.
- Check external attack surface scans for internet facing instances of the component.
- Run an authenticated vulnerability scan once your scanner ships a check for this CVE.
Monitoring Recommendations
- Forward Organization identity-first login flow of the Keycloak authentication server application, access and audit logs to your SIEM for retrospective hunting.
- Alert on new processes, configuration changes or outbound connections from the affected service.
- Track the vendor advisory and the CISA KEV catalog for changes in exploitation status.
How to Mitigate CVE-2026-112208
Immediate Actions Required
- Apply the fixed version of Organization identity-first login flow of the Keycloak authentication server named in the vendor advisory.
- Prioritize internet facing and business critical instances first.
- Rescan after the change to confirm the exposure is closed.
Patch Information
Use the fixed version listed in the vendor advisory for Organization identity-first login flow of the Keycloak authentication server.
Workarounds
- If patching must wait, restrict network access to the affected service and place it behind authentication or a web application firewall rule.
CWE References
Technical References
This entry is built directly from NVD, CISA KEV and EPSS data. Verify fixed versions in the vendor advisory before you deploy.
Frequently asked questions
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