CVE-2026-72839 filebrowser through 2.63.16 Privilege Escalation via Signup
Unauthenticated attackers can register accounts with full root scope permissions when self-signup is enabled, leading to unrestricted file access and modification.
- 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-2026-72839?
CVE-2026-72839 is a critical vulnerability in filebrowser, published on 13 Aug 2026. An attacker can exploit it over the internet without logging in, with no action from the victim.
Official description
filebrowser through 2.63.16 fails to properly restrict scope and permissions when self-signup is enabled with default CreateUserDir setting. Unauthenticated attackers can register accounts that inherit the server root scope with full create, modify, delete, rename, share, and download permissions, allowing unrestricted access to all files.
Weakness: CWE-266
Which versions are affected by CVE-2026-72839?
How do I fix CVE-2026-72839?
No fix has been published for CVE-2026-72839 yet. Limit exposure of the affected software until one is available.
Is CVE-2026-72839 being exploited?
It is not confirmed as exploited in the wild, but public exploit code for CVE-2026-72839 exists.
Sources
Also known as GHSA-6759-996p-gpj6, GHSA-6g9f-8x2v-mq2c.