Medium severity · published Aug 14, 2026
CVE-2026-72838
FileBrowser before 2.63.19 Disk Exhaustion via TUS Upload
6.5
CVSS
0.5%
EPSS
No
On KEV
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.
CVSS vector
CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H
Attack vector
Network
Complexity
Low
Privileges
Low
User interaction
None
Confidentiality
None
Integrity
None
Availability
High
Scope
Unchanged
Exploitation
Is it being used?
Exploit prediction (EPSS)0.5% · higher than 45% of CVEs
Exploited in the wildNo evidence yet
CISA KEVNot listed
Ransomware campaign useNot known
Affected products
Which versions
FI
filebrowser · filebrowser
before 2.63.19 · source: vendor
References
NVD
https://nvd.nist.gov/vuln/detail/CVE-2026-72838
CVE.org
https://www.cve.org/CVERecord?id=CVE-2026-72838
github.com
https://github.com/filebrowser/filebrowser/commit/4daddec6f200b03a721197d8c0b4b652c994894e
github.com
https://github.com/filebrowser/filebrowser/security/advisories/GHSA-ffv3-7h97-993q
www.vulncheck.com
https://www.vulncheck.com/advisories/filebrowser-before-disk-exhaustion-via-tus-upload
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