CVE-2026-18571CWE-862broken-access-control

CVE-2026-18571

Medium · published August 2, 2026

CVSS v3.1
6.6
EPSS
1%
Percentile
45.2
In the wild
Unconfirmed
What it is

A flaw was found in the user creation component of Keycloak when Fine-Grained Admin Permissions V2 (FGAP V2) is enabled. This issue allows a sub-administrator with permission to create users to add those users to any group, even groups the sub-administrator is not authorized to manage. This could lead to unauthorized access to sensitive information or elevated privileges for the newly created users.

The record
Technical detail
CVSS v3.1
6.6 · MEDIUM
Vector
CVSS:3.1/AV:N/AC:H/PR:H/UI:N/S:U/C:H/I:H/A:H
CVSS v4.0
Not supplied
EPSS
0.00548 · 45.2th percentile
Weakness
CWE-862 · Missing Authorization
Published
2026-08-02T10:16Z
Affected products (1)
ProductVersionsFixed in
redhat/build_of_keycloakall versions—
References (4)
https://access.redhat.com/errata/RHSA-2026:68277 · [email protected]https://access.redhat.com/errata/RHSA-2026:68278 · [email protected]https://access.redhat.com/security/cve/CVE-2026-18571 · [email protected]https://bugzilla.redhat.com/show_bug.cgi?id=2509759 · [email protected]
EPSS history
Timeline
  • 02 AUG 05:18Z
    Keycloak-services: keycloak-services: fgap v2 group assignment bypass during user creation
    cvelistv5