CVE-2026-35607 File Browser: Proxy auth auto-provisioned users inherit Execute permission and Commands
Attackers using proxy authentication can gain execute permissions and run commands, leading to privilege escalation and potential code execution.
- Exploited in the wild
- Not known
- Login needed
- Not needed
- Attackable
- Over the internet
- Victim action needed
- Not needed
- Fix
- Available
What is CVE-2026-35607?
CVE-2026-35607 is a high-severity 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, the fix in commit b6a4fb1 ("self-registered users don't get execute perms") stripped Execute permission and Commands from users created via the signup handler. The same fix was not applied to the proxy auth handler. Users auto-created on first successful proxy-auth login are granted execution capabilities from global defaults, even though the signup path was explicitly changed to prevent execution rights from being inherited by automatically provisioned accounts. This vulnerability is fixed in 2.63.1.
Weakness: CWE-269
Which versions are affected by CVE-2026-35607?
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-2026-35607?
Upgrade github.com/filebrowser/filebrowser/v2 to 2.63.1 or later.
Is CVE-2026-35607 being exploited?
It is not confirmed as exploited in the wild, but public exploit code for CVE-2026-35607 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-7526-j432-6ppp, GO-2026-5205.