CVE-2026-86306 light0011 cms Cookie Helper UserModel.class.php improper authentication
Remote attackers can bypass authentication in light0011 CMS by manipulating the Username argument in the Cookie Helper, potentially leading to account takeover.
- 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-2026-86306?
CVE-2026-86306 is a medium-severity authentication bypass vulnerability in light0011 cms, published on 7 Sep 2026. An attacker can exploit it over the internet without logging in, with no action from the victim.
Official description
A weakness has been identified in light0011 cms c774dce31c6df0055568a8d5c53d964d99be199d/f72cf46f601efb2a0618c3814cc2f61380b38930. This affects an unknown part of the file App/Home/Model/UserModel.class.php of the component Cookie Helper. Executing a manipulation of the argument Username can lead to improper authentication. The attack may be performed from remote. The exploit has been made available to the public and could be used for attacks. This product utilizes a rolling release system for continuous delivery, and as such, version information for affected or updated releases is not disclosed. The project was informed of the problem early through an issue report but has not responded yet.
Weakness: CWE-287
Which versions are affected by CVE-2026-86306?
How do I fix CVE-2026-86306?
No fix has been published for CVE-2026-86306 yet. Limit exposure of the affected software until one is available.
Upgrade, and rotate credentials and sessions that may have been exposed. More about Authentication bypass.
Is CVE-2026-86306 being exploited?
It is not confirmed as exploited in the wild, but public exploit code for CVE-2026-86306 exists.
Sources
Also known as GHSA-3672-84c4-cx98.