Uncontrolled Memory Allocation in FileBrowser - CVE-2025-53893
Published: June 8, 2026
Vulnerability identifier: #VU133477
CSH Severity: Low
CVSS v4.0: 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:U/U:Clear
CVE-ID: CVE-2025-53893
CWE-ID: CWE-789
Exploitation vector: Remote access
Exploit availability:
No public exploit available
Vendor: File Browser
Affected software:
FileBrowser
FileBrowser
Detailed vulnerability description
The vulnerability allows a remote user to cause a denial of service.
The vulnerability exists due to memory allocation with excessive size value in the file reading logic of the /api/resources/{file-name} endpoint when reading a previously uploaded oversized file. A remote user can upload a very large file and then request it to be opened to cause a denial of service.
The issue occurs because the application attempts to load the entire file content into memory during read operations.
How to mitigate CVE-2025-53893
Install security update from vendor's website.