CVEvulnerability

CVE-2026-18215

8.1 HIGH Published 2026-07-31 Modified 2026-09-16 Official page ↗
Status
Modified
Published
2026-07-31
Last modified
2026-09-16
Assigner
[email protected]
CVSS 3.1 ([email protected])
6.8 MEDIUM — CVSS:3.1/AV:N/AC:H/PR:L/UI:N/S:U/C:H/I:H/A:N
CVSS 3.1 ([email protected])
8.1 HIGH — CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:N
Weaknesses
CWE-287

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 configurations

• redhat build of keycloak

Related

Weakness · CWE (1)

  • CWE-287 Improper Authentication weakness

References