CVE-2026-35585
published 2026-04-07CVE-2026-35585: File Browser is a file managing interface for uploading, deleting, previewing, renaming, and editing files within a specified directory. From 2.0.0 until…
PriorityP355high7.2CVSS 3.1
AVNACLPRHUINSUCHIHAH
EPSS
1.92%
77.4th percentile
File Browser is a file managing interface for uploading, deleting, previewing, renaming, and editing files within a specified directory. From 2.0.0 until 2.33.8, the hook system in File Browser — which executes administrator-defined shell commands on file events such as upload, rename, and delete — is vulnerable to OS command injection. Variable substitution for values like $FILE and $USERNAME is performed via os.Expand without sanitization. An attacker with file write permission can craft a malicious filename containing shell metacharacters, causing the server to execute arbitrary OS commands when the hook fires. This results in Remote Code Execution (RCE). This feature has been disabled by default for all installations from v2.33.8 onwards, including for existent installations.
Affected
3 ranges
| Vendor | Product | Version range | Fixed in |
|---|---|---|---|
| filebrowser | filebrowser | — | — |
| filebrowser | filebrowser | 2.0.0 – 2.63.1 | — |
| github.com | filebrowser_filebrowser_v2 | 2.0.0-rc.1 – 2.63.1 | — |
CVSS provenance
nvdv3.17.2HIGHCVSS:3.1/AV:N/AC:L/PR:H/UI:N/S:U/C:H/I:H/A:H
nvdv4.07.5HIGHCVSS:4.0/AV:N/AC:L/AT:P/PR:H/UI:N/VC:H/VI:H/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:X/V:X/RE:X/U:X
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OSV
File Browser has a Command Injection via Hook Runner
osv·2026-04-08
CVE-2026-35585 [HIGH] File Browser has a Command Injection via Hook Runner
File Browser has a Command Injection via Hook Runner
> [!NOTE]
> **This feature has been disabled by default for all installations from v2.33.8 onwards, including for existent installations**. To exploit this vulnerability, the instance administrator must turn on a feature and ignore all the warnings about known vulnerabilities. We're publishing this new advisory to make it clear that it also applies to Hook Runners and not just to the Shell Commands, since all advisories until now focused only on the shell command execution.
>
> For more information about tracking vulnerability issues related to the Command Execution features, check https://github.com/filebrowser/filebrowser/issues/5199.
## Overview
The hook system in File Browser — which executes administrator-defined shell commands o
GHSA
File Browser has a Command Injection via Hook Runner
ghsa·2026-04-08
CVE-2026-35585 [HIGH] CWE-78 File Browser has a Command Injection via Hook Runner
File Browser has a Command Injection via Hook Runner
> [!NOTE]
> **This feature has been disabled by default for all installations from v2.33.8 onwards, including for existent installations**. To exploit this vulnerability, the instance administrator must turn on a feature and ignore all the warnings about known vulnerabilities. We're publishing this new advisory to make it clear that it also applies to Hook Runners and not just to the Shell Commands, since all advisories until now focused only on the shell command execution.
>
> For more information about tracking vulnerability issues related to the Command Execution features, check https://github.com/filebrowser/filebrowser/issues/5199.
## Overview
The hook system in File Browser — which executes administrator-defined shell commands o
No detection rules found.
No public exploits indexed.
2026-04-07
Published