CVE-2025-53893 File Browser Vulnerable to Uncontrolled Memory Consumption Due to Oversized File Processing
An authenticated user can crash the File Browser server by uploading and reading an oversized file, causing uncontrolled memory consumption.
- Exploited in the wild
- Not known
- Login needed
- Not needed
- Attackable
- Over the internet
- Victim action needed
- Not needed
- Fix
- Available
What is CVE-2025-53893?
CVE-2025-53893 is a high-severity denial of service vulnerability in filebrowser, published on 15 Jul 2025. An attacker can exploit it over the internet without logging in, with no action from the victim.
Official description
File Browser provides a file managing interface within a specified directory and it can be used to upload, delete, preview, rename, and edit files. In version 2.38.0, a Denial of Service (DoS) vulnerability exists in the file processing logic when reading a file on endpoint `Filebrowser-Server-IP:PORT/files/{file-name}` . While the server correctly handles and stores uploaded files, it attempts to load the entire content into memory during read operations without size checks or resource limits. This allows an authenticated user to upload a large file and trigger uncontrolled memory consumption on read, potentially crashing the server and making it unresponsive. As of time of publication, no known patches are available.
Which versions are affected by CVE-2025-53893?
4 open source packages ship an affected version, including github.com/filebrowser/filebrowser/v2 and github.com/filebrowser/filebrowser. It affects 1 product.
| Package | Affected | Fixed in |
|---|---|---|
github.com/filebrowser/filebrowser/v2 Go | All versions | None |
github.com/filebrowser/filebrowser/v2 Go | All versions | None |
github.com/filebrowser/filebrowser/v2 Go | From 2.0.0-rc.1 | None |
github.com/filebrowser/filebrowser Go | From 1.0.0 | None |
Products include Filebrowser Filebrowser.
How do I fix CVE-2025-53893?
No fix published yet.
Upgrade, then put limits on request size, rate and nesting depth so one client cannot exhaust the service. More about Denial of service.
Is CVE-2025-53893 being exploited?
It is not confirmed as exploited in the wild, but public exploit code for CVE-2025-53893 exists.
Other vulnerabilities in filebrowser
- CVE-2026-32760 File Browser Self Registration Grants Any User Admin Access When Default Permissions Include Admin
- CVE-2026-29188 File Browser: TUS Delete Endpoint Bypasses Delete Permission Check
- CVE-2023-39612 Cross-site scripting in n/a
- CVE-2026-30934 FileBrowser Quantum: Stored XSS in public share page via unsanitized share metadata (text/template misuse)
- CVE-2021-46398 Cross-Site Request Forgery in Filebrowser
Sources
Also known as GHSA-7xqm-7738-642x, GO-2025-3811.