TI-2026-25249 Aliases CVE-2026-32758 GHSA-9f3r-2vgw-m8xp

File Browser has an Access Rule Bypass via Path Traversal in Copy/Rename Destination Parameter

MEDIUM 62CWE-22Published 2026-03-19 · Updated 2026-03-20

Key facts

Attack vector: Network
Privileges required: Low
User interaction: None
Attack complexity: Low
Impact type: Security bypass
Confidentiality · integrity · availability: None · High · None
Fix status: Fixed

Attack profile from CVSS 3.1 · CNA. Fix status from CNA and GitHub. Impact type from CWE-863.

Summary

File Browser is a file managing interface for uploading, deleting, previewing, renaming, and editing files within a specified directory. Versions 2.61.2 and below are vulnerable to Path Traversal through the resourcePatchHandler (http/resource.go). The destination path in resourcePatchHandler is validated against access rules before being cleaned/normalized, while the actual file operation calls path.Clean() afterward—resolving .. sequences into a different effective path. This allows an authenticated user with Create or Rename permissions to bypass administrator-configured deny rules (both prefix-based and regex-based) by injecting .. sequences in the destination parameter of a PATCH request. As a result, the user can write or move files into any deny-rule-protected path within their scope. However, this cannot be used to escape the user's BasePathFs scope or read from restricted paths. This issue has been fixed in version 2.62.0.

Why it matters now

Exploitation Proof of concept CISA SSVC · not in CISA KEV

EPSS 0.00403 34th percentileScored 2026-11-07

Fix Fixed filebrowser (filebrowser): 2.62.0github.com/filebrowser/filebrowser/v2 (Go): 2.62.0

SSVC decision points

CISA ADP · SSVC 2.0.3

Exploitation: Poc
Automatable: No
Technical impact: Partial

The decision (Track, Attend, Act) also depends on your mission and well-being impact; see CISA's SSVC guide.

Affected products

Vendor	Product	Affected versions	Fixed in	Status	Source
filebrowser	filebrowser	before 2.62.0	2.62.0	Patch available	CNA
—	github.com/filebrowser/filebrowser/v2 (Go)	before 2.62.0	2.62.0	Patch available	GHSA-9f3r-2vgw-m8xp

filebrowser Vendorfilebrowser Affected before 2.62.0 Fixed in 2.62.0 Patch available CNA
github.com/filebrowser/filebrowser/v2 (Go) Vendor— Affected before 2.62.0 Fixed in 2.62.0 Patch available GHSA-9f3r-2vgw-m8xp

CPE configurations NVD · 1

CPE	Versions	Role	Vendor
cpe:2.3:a:filebrowser:filebrowser::::::::	before 2.62.0	Vulnerable	filebrowser

cpe:2.3:a:filebrowser:filebrowser:*:*:*:*:*:*:*:* Versions before 2.62.0 Vulnerable ·filebrowser

Remediation

Fix · CNA filebrowser (filebrowser) Fixed in 2.62.0
Fix · GHSA-9f3r-2vgw-m8xp github.com/filebrowser/filebrowser/v2 (Go) Fixed in 2.62.0 Advisory →

Timeline

2026-10-02 Threatist record created from CVE-2026-32758
2026-10-03 Alias added: GHSA-9f3r-2vgw-m8xp

References

Patch 1

https://github.com/filebrowser/filebrowser/commit/4bd7d69c82163b201a987e99c0c50d7ecc6ee5f1

Advisory 2

Other 2

TI-2026-25251 File Browser Self Registration Grants Any User Admin Access When Default Permissions Include Admin CVSS 4.0CRITICAL 10.0
TI-2026-23305 File Browser: TUS Delete Endpoint Bypasses Delete Permission Check CVSS 3.1CRITICAL 9.1
TI-2026-26777 File Browser's Signup Grants Execution Permissions When Default Permissions Includes Execution CVSS 3.1CRITICAL 9.8
TI-2025-33000 File Browser vulnerable to command execution allowlist bypass CVSS 3.1HIGH 8.1
TI-2026-23759 FileBrowser Quantum: Stored XSS in public share page via unsanitized share metadata (text/template misuse) CVSS 3.1HIGH 8.9
TI-2023-20699 A cross-site scripting (XSS) vulnerability in FileBrowser before v2.23.0 allows an… CVSS 3.1CRITICAL 9.0

See all 31 →

Sources

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