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Vulnerability record · CVE-2026-72838 · published 14 August 2026

CVE-2026-72838: Allocation without limits vulnerability

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.

7.1 CVSS 4.0 High EPSS 0.53% · top 57.5% CWE-770 · Allocation without limits Deferred
7.1CVSS 4.0 base score
0.53%EPSS exploitation probability, 30 days
NoNot in CISA KEV
0Affected product versions listed by NVD
3References
8 Sep 2026Last modified by NVD

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:4.0/AV:N/AC:L/AT:N/PR:L/UI:N/VC:N/VI:N/VA:H/SC:N/SI:N/SA:N/E:X/CR:X/IR:X/AR:X/MAV:X/MAC:X/MAT:X/MPR:X/MUI:X/MVC:X/MVI:X/MVA:X/MSC:X/MSI:X/MSA:X/S:X/AU:X/R:

References

LinkTags
https://github.com/filebrowser/filebrowser/commit/4daddec6f200b03a721197d8c0b4b652c994894e
https://github.com/filebrowser/filebrowser/security/advisories/GHSA-ffv3-7h97-993q
https://www.vulncheck.com/advisories/filebrowser-before-disk-exhaustion-via-tus-upload

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Source: NIST National Vulnerability Database (record CVE-2026-72838), CISA KEV, FIRST EPSS (scores of 2026-09-26). This page is refreshed as NVD updates the record.