What is CVE-2026-72838?

CVE-2026-72838 is a medium-severity vulnerability in Filebrowser, classified under Allocation of Resources Without Limits or Throttling. CVSS score: 6.5/10. Published 2026-08-14.

How severe is CVE-2026-72838?

Medium severity. CVSS v3 base score is 6.5 out of 10.

Resource exhaustion in Filebrowser

CVE-2026-72838

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.

Published 2026-08-14 · last modified 2026-09-08.

CVSS v3 metric

CVSS v3 base score 6.5 (Medium). Vector: CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H.

EPSS exploit prediction

EPSS: 0.005 (42.6th percentile), scored 2026-09-29.

Very low probability of exploitation in the next 30 days; routine patching cadence is appropriate. 43rd percentile — 42.6% of CVEs in the catalogue have a lower EPSS than this one. How to read EPSS.

EPSS over last 30 days · oldest: 0.003 · newest: 0.005 · change: +0.002

Affected products

Filebrowser — versions 0, 2.63.19

Weakness classification (CWE)

CWE-770 — Allocation of Resources Without Limits or Throttling

References

github.com/filebrowser/filebrowser/security/advisories/GHSA-ffv3-7h97-993q (vendor-advisory)
github.com/filebrowser/filebrowser/commit/4daddec6f200b03a721197d8c0b4b652c9948… (patch)
www.vulncheck.com/advisories/filebrowser-before-disk-exhaustion-via-tus-upload (third-party-advisory)

Frequently asked questions

What is CVE-2026-72838?: CVE-2026-72838 is a medium-severity vulnerability in Filebrowser, classified under Allocation of Resources Without Limits or Throttling. CVSS score: 6.5/10. Published 2026-08-14.
How severe is CVE-2026-72838?: Medium severity. CVSS v3 base score is 6.5 out of 10.