Red HatCVE-2026-18215
Red Hat Data Grid 8: improper authentication
Medium6.8CVE-2026-18215 · Published Jul 31, 2026 · updated Sep 16, 2026
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 versions
| Package | Affected | Fixed in |
|---|---|---|
| Red Hat Data Grid 8 Product | all versions | No fix yet |
| Red Hat JBoss Enterprise Application Platform Expansion Pack Product | all versions | No fix yet |
| Red Hat Single Sign-On 7 Product | all versions | No fix yet |
| Red Hat build of Keycloak 26.6.7 Product | all versions | No fix yet |
| all versions | No fix yet | |
| all versions | No fix yet |
Details and references
- CVSS 3.1
- CVSS:3.1/AV:N/AC:H/PR:L/UI:N/S:U/C:H/I:H/A:N
- Severity from
- the vendor (its own CVE record or advisory)
- Weakness
- CWE-287
More Red Hat advisories
All Red Hat| Date | Advisory | Severity | Fixed in |
|---|---|---|---|
| Jul 31 | Red Hat Ansible Automation Platform 2: improper certificate validation | High8.2 | No fix yet |
| Jul 31 | Red Hat gnome-remote-desktop as shipped: resource exhaustion | High7.5 | No fix yet |
| Jul 31 | A flaw was found in 389 Directory Server | High7.5 | No fix yet |
| Jul 31 | Red Hat: buffer overflow | High7.5 | No fix yet |
| Jul 31 | Red Hat Advanced Cluster Security 4: insufficient authenticity check | High8.5 | No fix yet |
| Jul 31 | Red Hat SAML protocol implementation of Keycloak: improper input validation | Low3.4 | No fix yet |