TI-2026-26779 Aliases CVE-2026-34530 GHSA-xfqj-3vmx-63wv

File Browser is vulnerable to Stored Cross-Site Scripting via text/template branding injection

MEDIUM 64CWE-79Published 2026-04-01 · Updated 2026-04-04

Key facts

Attack vector: Network
Privileges required: High
User interaction: Required
Attack complexity: Low
Impact type: Cross-site scripting
Confidentiality · integrity · availability: High · Low · None
Fix status: Fixed

Attack profile from CVSS 3.1 · CNA. Fix status from CNA and GitHub. Impact type from CWE-79.

Summary

File Browser is a file managing interface for uploading, deleting, previewing, renaming, and editing files within a specified directory. Prior to version 2.62.2, the SPA index page in File Browser is vulnerable to Stored Cross-Site Scripting (XSS) via admin-controlled branding fields. An admin who sets branding.name to a malicious payload injects persistent JavaScript that executes for ALL visitors, including unauthenticated users. This issue has been patched in version 2.62.2.

Why it matters now

Exploitation Proof of concept CISA SSVC · not in CISA KEV

EPSS 0.0037 31st percentileScored 2026-11-07

Public exploit Yes 1 exploit referenceTagged by NVD

Fix Fixed filebrowser (filebrowser): 2.62.2github.com/filebrowser/filebrowser/v2 (Go): 2.62.2

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 2.62.2	2.62.2	Patch available	CNA
—	github.com/filebrowser/filebrowser/v2 (Go)	before 2.62.2	2.62.2	Patch available	GHSA-xfqj-3vmx-63wv

filebrowser Vendorfilebrowser Affected before 2.62.2 Fixed in 2.62.2 Patch available CNA
github.com/filebrowser/filebrowser/v2 (Go) Vendor— Affected before 2.62.2 Fixed in 2.62.2 Patch available GHSA-xfqj-3vmx-63wv

CPE configurations NVD · 1

CPE	Versions	Role	Vendor
cpe:2.3:a:filebrowser:filebrowser::::::::	before 2.62.2	Vulnerable	filebrowser

cpe:2.3:a:filebrowser:filebrowser:*:*:*:*:*:*:*:* Versions before 2.62.2 Vulnerable ·filebrowser

Remediation

Fix · CNA filebrowser (filebrowser) Fixed in 2.62.2
Fix · GHSA-xfqj-3vmx-63wv github.com/filebrowser/filebrowser/v2 (Go) Fixed in 2.62.2 Advisory →

Timeline

2026-10-02 Threatist record created from CVE-2026-34530
2026-10-03 Alias added: GHSA-xfqj-3vmx-63wv

References

Exploit 1

https://github.com/filebrowser/filebrowser/security/advisories/GHSA-xfqj-3vmx-63wv

Advisory 1

https://nvd.nist.gov/vuln/detail/CVE-2026-34530

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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