Missing Authorization in Keycloak - CVE-2026-17526
Published: September 18, 2026
Vulnerability identifier: #VU150838
CSH Severity: Low
CVSS v4: 8.6 [CVSS:4.0/AV:N/AC:L/AT:N/PR:H/UI:N/VC:H/VI:H/VA:H/SC:N/SI:N/SA:N]
CVE-ID: CVE-2026-17526
CWE-ID: CWE-862
Exploitation vector: Remote access
Exploit availability:
No public exploit available
Vulnerability details
The vulnerability allows a remote user to gain full administrative control over a realm.
The vulnerability exists due to missing authorization in Keycloak impersonation functionality when impersonating users. A remote privileged user can impersonate a realm administrator to gain full administrative control over a realm.
Affected software
Keycloak
How to mitigate CVE-2026-17526
Install security update from vendor's website.
Keycloak - update to 26.7.4