What is CVE-2026-34530?

CVE-2026-34530 is a medium-severity vulnerability in Filebrowser, classified under Cross-site Scripting. CVSS score: 6.9/10. Published 2026-04-01.

How severe is CVE-2026-34530?

Medium severity. CVSS v3 base score is 6.9 out of 10.

XSS in Filebrowser

CVE-2026-34530

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.

Vulnerability class: XSS (Cross-Site Scripting)

EPSS: 0.004 (28.2th percentile) — read the EPSS interpretation.

CVSS v3 metric

CVSS v3 base score 6.9 (Medium). Vector: CVSS:3.1/AV:N/AC:L/PR:H/UI:R/S:C/C:H/I:L/A:N.

Affected products

Filebrowser — versions < 2.62.2

Weakness classification (CWE)

CWE-79 — Cross-site Scripting

References

security-advisories@github.com (x_refsource_CONFIRM, Exploit, Vendor Advisory)
security-advisories@github.com (Product, x_refsource_MISC, Release Notes)

Frequently asked questions

What is CVE-2026-34530?: CVE-2026-34530 is a medium-severity vulnerability in Filebrowser, classified under Cross-site Scripting. CVSS score: 6.9/10. Published 2026-04-01.
How severe is CVE-2026-34530?: Medium severity. CVSS v3 base score is 6.9 out of 10.