CVE-2026-72838 FileBrowser before 2.63.19 Disk Exhaustion via TUS Upload
Authenticated attackers can exhaust disk space by sending oversized TUS upload requests, causing service unavailability 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-2026-72838?
CVE-2026-72838 is a high-severity denial of service 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 2.63.19 fail to enforce the declared Upload-Length in the TUS resumable-upload PATCH endpoint, allowing authenticated users to write arbitrary data to disk. Attackers can send oversized request bodies that exceed the declared upload length to exhaust available disk space and cause service unavailability.
Weakness: CWE-770
Which versions are affected by CVE-2026-72838?
How do I fix CVE-2026-72838?
No fix has been published for CVE-2026-72838 yet. Limit exposure of the affected software until one is available.
Upgrade, then put limits on request size, rate and nesting depth so one client cannot exhaust the service. More about Denial of service.
Is CVE-2026-72838 being exploited?
There is no known exploitation of CVE-2026-72838 in the wild and no public exploit code.
Sources
Also known as GHSA-4fmc-f52r-93hm, GHSA-ffv3-7h97-993q.