CVE-2026-82238 filebrowser 2.24.0 Race Condition via TUS concurrent PATCH uploads
Authenticated attackers can exploit a race condition in TUS uploads to write files larger than declared, bypassing size validation.
- 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-2026-82238?
CVE-2026-82238 is a low-severity vulnerability in filebrowser, published on 28 Aug 2026. Any signed-in user can exploit it over the network, with no action from the victim.
Official description
filebrowser from version 2.24.0 contains a race condition in the TUS upload handler that allows authenticated users to write past the declared Upload-Length by sending concurrent PATCH requests. Attackers can send multiple simultaneous PATCH requests at the same offset to bypass length validation, resulting in files that exceed their declared size and triggering completion hooks for oversized uploads.
Weakness: CWE-367
Which versions are affected by CVE-2026-82238?
How do I fix CVE-2026-82238?
No fix has been published for CVE-2026-82238 yet. Limit exposure of the affected software until one is available.
Is CVE-2026-82238 being exploited?
It is not confirmed as exploited in the wild, but public exploit code for CVE-2026-82238 exists.
Sources
Also known as GHSA-4r8p-gqj2-mwgm, GHSA-6fr9-pm38-mc2g.