Disk Exhaustion Vulnerability in FileBrowser by filebrowser
CVE-2026-72838

7.1HIGH

Key Information:

Vendor

Filebrowser

Status
Filebrowser
Vendor
CVE Published:
14 August 2026

What is CVE-2026-72838?

FileBrowser versions prior to 2.63.19 have a vulnerability that allows authenticated users to bypass upload size restrictions set in the TUS resumable-upload PATCH endpoint. This can lead to the ability to write excessive data to the disk, potentially exhausting disk space and resulting in service disruptions. Attackers can exploit this flaw by sending oversized request bodies that exceed the established upload length, thereby causing instability and unavailability of the service.

Affected Version(s)

filebrowser 0 < 2.63.19

filebrowser 2.63.19

References

https://github.com/filebrowser/filebrowser/security/advis...
vendor-advisory
https://github.com/filebrowser/filebrowser/commit/4daddec...
patch
https://www.vulncheck.com/advisories/filebrowser-before-d...
third-party-advisory

CVSS V4

Score:
7.1
Severity:
HIGH
Confidentiality:
None
Integrity:
None
Availability:
High
Attack Vector:
Network
Attack Complexity:
Low
Attack Required:
None
Privileges Required:
Undefined
User Interaction:
None

Timeline

  • Vulnerability published

  • Vulnerability Reserved

Credit

GG-Feng
hacdias
.