CVE-2026-63235 Improper access control vulnerability
Unauthenticated attackers can forcibly terminate any user's session by providing their email address, causing a denial of service.
- Exploited in the wild
- Not known
- Login needed
- Not needed
- Attackable
- Over the internet
- Victim action needed
- Not needed
- Fix
- None listed
What is CVE-2026-63235?
CVE-2026-63235 is a low-severity missing authorization vulnerability in Three Learning Koollab LMS, published on 29 Jul 2026. An attacker can exploit it over the internet without logging in, with no action from the victim.
Official description
An improper access control vulnerability in Koollab LMS allowed an unauthenticated attacker to forcibly terminate the session of any user given their email address via the login kickout endpoint, resulting in a denial of service.
Weakness: CWE-284
Which versions are affected by CVE-2026-63235?
How do I fix CVE-2026-63235?
No fix has been published for CVE-2026-63235 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-2026-63235 being exploited?
There is no known exploitation of CVE-2026-63235 in the wild and no public exploit code.
Sources
Also known as GHSA-w2rf-rgph-3xvj.