CVE-2026-8209 Path traversal in gibbon
Attackers with Teacher privileges can cause denial of service in Gibbon by exploiting a path traversal flaw during file extraction.
- Exploited in the wild
- Not known
- Login needed
- An administrator
- Attackable
- Over the internet
- Victim action needed
- Not needed
- Fix
- None listed
What is CVE-2026-8209?
CVE-2026-8209 is a medium-severity path traversal vulnerability in gibbonedu gibbon, published on 9 May 2026. An attacker needs administrator access to exploit it, with no action from the victim.
Official description
Gibbon versions before v30.0.01 are affected by a path traversal vulnerability resulting in DOS by attempting extraction of web application PHP files, failed .zip extraction results in deletion of the file and a DOS condition. Successful exploitation requires Teacher or higher privileges. Exploitation could result in loss of availability of the web application.
Weakness: CWE-23
Which versions are affected by CVE-2026-8209?
How do I fix CVE-2026-8209?
No fix has been published for CVE-2026-8209 yet. Limit exposure of the affected software until one is available.
Upgrade, and resolve every user-supplied path against an allowed base folder before opening it. More about Path traversal.
Is CVE-2026-8209 being exploited?
There is no known exploitation of CVE-2026-8209 in the wild and no public exploit code.
Sources
Also known as GHSA-f8qc-g9ff-p4m7.