File Browser has a Command Injection via Hook Runner

Description

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.

Scores

EPSS (exploitation in 30 days)

2.0% · top 19% of all CVEs (6 Nov 2026)

CISA SSVC

Exploitation: poc · Automatable: no · Technical impact: total

The list uses the assigner's score when there is one, then CISA's, then NVD's: High 7.5.

Weakness

• CWE-78: Improper Neutralization of Special Elements used in an OS Command ('OS Command Injection') (opens in a new tab)All about CWE-78 and its CVEs
• CWE-88: Improper Neutralization of Argument Delimiters in a Command ('Argument Injection') (opens in a new tab)All about CWE-88 and its CVEs

Affected products

• filebrowser · filebrowser

  • affected >= 2.0.0-rc.1, < 2.33.8

Affected packages

From reviewed advisories of the GitHub Advisory Database.

• Gogithub.com/filebrowser/filebrowser/v2GHSA-jvpw-637p-h3pw (opens in a new tab)

References (2)

• https://github.com/filebrowser/filebrowser/security/advisories/GHSA-jvpw-637p-h3pw (opens in a new tab)x_refsource_CONFIRMexploit
• https://github.com/filebrowser/filebrowser/issues/5199 (opens in a new tab)x_refsource_MISC

Sources

The same CVE in the primary databases and aggregators, to check against.

• CVE.org record (opens in a new tab)
• CVE List JSON (GitHub) (opens in a new tab)
• NVD (opens in a new tab)
• FIRST EPSS (opens in a new tab)
• OSV.dev (opens in a new tab)
• GitHub Advisory GHSA-jvpw-637p-h3pw (opens in a new tab)
• CIRCL Vulnerability-Lookup (opens in a new tab)

Badge for a README or a ticket

[![CVE-2026-35585](https://trackcve.app/badge/CVE-2026-35585.svg)](https://trackcve.app/cve/CVE-2026-35585)

Record last updated 9 Jun 2026, 11:49 UTC.