CVE-2026-17526 Keycloak - Broken Access Control

Keycloak contains a broken access control vulnerability caused by improper impersonation role checks, letting users with impersonation role gain full administrative control over the realm, exploit requires impersonation role.

CVSS base score 7.2 /10

High

CISA KEV: Not listed
Public exploit: None known
Authentication: Required
EPSS: 0.45% chance of exploitation in 30 days

View the NVD record ↗

Details

Type: Broken Access Control
Impact: Privilege Escalation
CVSS vector: CVSS:3.1/AV:N/AC:L/PR:H/UI:N/S:U/C:H/I:H/A:H
Published: 16 September 2026
Updated: 15 October 2026
Weakness: CWE-862

Vendor fix

Update to the latest version with fixed impersonation role checks.

Patching closes this CVE. It does not tell you which of your systems run the affected version, or what else is exposed alongside them.

References

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