CVE-2026-111681 EFAK through 5.1.0 Privilege Escalation via /api/users REST API
Authenticated low-privilege users can escalate to administrator privileges via the /api/users REST API due to missing role checks.
- Exploited in the wild
- Not known
- Login needed
- Any signed-in user
- Attackable
- Over the internet
- Victim action needed
- Not needed
- Fix
- None listed
What is CVE-2026-111681?
CVE-2026-111681 is a high-severity missing authorization vulnerability in smartloli EFAK, published on 16 Oct 2026. Any signed-in user can exploit it over the network, with no action from the victim.
Official description
EFAK through 5.1.0 contains a missing authorization vulnerability that allows authenticated low-privilege users to manage accounts because the /api/users endpoints lack administrator role checks. Attackers can send POST, PUT, or DELETE requests to UserController to grant themselves ROLE_ADMIN, create administrators, or delete users, gaining control of managed Kafka clusters.
Weakness: CWE-862
Which versions are affected by CVE-2026-111681?
How do I fix CVE-2026-111681?
No fix has been published for CVE-2026-111681 yet. Limit exposure of the affected software until one is available.
Upgrade, and check permissions on every request on the server, not only in the interface. More about Missing authorization.
Is CVE-2026-111681 being exploited?
There is no known exploitation of CVE-2026-111681 in the wild and no public exploit code.
Sources
Also known as GHSA-64mr-r26w-689m.