6.8
Medium
CVE-2026-18215 Keycloak provides a way to let users log in using Microsoft accounts while restricting access to a specific organization…
Description
Keycloak provides a way to let users log in using Microsoft accounts while restricting access to a specific organization (tenant). A flaw was discovered where this restriction is ignored when using the token exchange feature. This means an attacker with a valid Microsoft token from a completely different organization could gain access to the Keycloak realm, potentially accessing sensitive data or performing unauthorized actions.
Affected products and versions
| Product | Affected versions | Fixed in |
|---|---|---|
| Red Hat Build of Keycloak | Versions not published | |
| Red Hat Data Grid 8 | Versions not published | |
| Red Hat JBoss Enterprise Application Platform Expansion Pack | Versions not published | |
| Red Hat Single Sign-On 7 | Versions not published | |
| Red Hat build of Keycloak 26.6 26.6 | earliest → < 26.6-20 | 26.6-20 |
| Red Hat build of Keycloak 26.6.7 | Versions not published |
References
- RHSA-2026:68277 access.redhat.com
- RHSA-2026:68278 access.redhat.com
- access.redhat.com access.redhat.com
- RHBZ#2508309 bugzilla.redhat.com
Timeline
- Published
- Last modified
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The 266 CVEs of Red Hat Build of Keycloak →
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CVE-2026-96453
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8.0
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