CVE-2026-35604 File Browser share links remain accessible after Share/Download permissions are revoked
Attackers can access revoked share links because the application fails to re-check owner permissions, allowing unauthorized data retrieval.
- Exploited in the wild
- Not known
- Login needed
- Not needed
- Attackable
- Over the internet
- Victim action needed
- Not needed
- Fix
- Available
What is CVE-2026-35604?
CVE-2026-35604 is a high-severity missing authorization vulnerability in filebrowser, published on 7 Apr 2026. An attacker can exploit it over the internet without logging in, with no action from the victim.
Official description
File Browser is a file managing interface for uploading, deleting, previewing, renaming, and editing files within a specified directory. Prior to 2.63.1, when an admin revokes a user's Share and Download permissions, existing share links created by that user remain fully accessible to unauthenticated users. The public share download handler does not re-check the share owner's current permissions. This vulnerability is fixed in 2.63.1.
Weakness: CWE-863
Which versions are affected by CVE-2026-35604?
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 | 2.63.1 |
github.com/filebrowser/filebrowser/v2 Go | All versions | 2.63.1 |
github.com/filebrowser/filebrowser/v2 Go | All versions | 2.63.1 |
github.com/filebrowser/filebrowser Go | All versions | None |
Products include Filebrowser Filebrowser.
How do I fix CVE-2026-35604?
Upgrade github.com/filebrowser/filebrowser/v2 to 2.63.1 or later.
Upgrade, and check permissions on every request on the server, not only in the interface. More about Missing authorization.
Is CVE-2026-35604 being exploited?
It is not confirmed as exploited in the wild, but public exploit code for CVE-2026-35604 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-v9w4-gm2x-6rvf, GO-2026-5659.