CVE-2026-72835 filebrowser before v2.63.21 Access Rule Bypass via Path Canonicalization
Authenticated users can bypass access rules to read denied files by using non-canonicalized path representations in filebrowser.
- 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-2026-72835?
CVE-2026-72835 is a high-severity path traversal vulnerability in filebrowser, published on 14 Aug 2026. Any signed-in user can exploit it over the network, with no action from the victim.
Official description
filebrowser versions before v2.63.21 fail to canonicalize paths before evaluating access rules, allowing authenticated users to bypass administrator-defined deny rules using case-variant or backslash-separated paths. Attackers can request files with alternate path representations that match no rule but resolve to the same filesystem object, gaining unauthorized access to denied files within their scope.
Weakness: CWE-41
Which versions are affected by CVE-2026-72835?
How do I fix CVE-2026-72835?
No fix has been published for CVE-2026-72835 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-2026-72835 being exploited?
It is not confirmed as exploited in the wild, but public exploit code for CVE-2026-72835 exists.
Sources
Also known as GHSA-8jx5-5rq8-69m2, GHSA-fgm5-pw99-w2p7.