CVE-2026-34528

Name: CVE-2026-34528
Creator: NVD / NIST
Published: 2026-04-01T21:17:00.66+00:00
License: https://creativecommons.org/publicdomain/zero/1.0/

CRITICALCVSS 9.8/10EPSS 0.65%

Last modified Jun 17, 2026

CVE-2026-34528 is a critical-severity vulnerability rated 9.8/10 on the CVSS scale. 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 signupHandler in File Browser applies default user permissions via d.settings.Defaults.Apply(user), then strips only Admin. EPSS estimates a 0.65% chance of exploitation in the next 30 days.

Description

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 signupHandler in File Browser applies default user permissions via d.settings.Defaults.Apply(user), then strips only Admin. The Execute permission and Commands list from the default user template are not stripped. When an administrator has enabled signup, server-side execution, and set Execute=true in the default user template, any unauthenticated user who self-registers inherits shell execution capabilities and can run arbitrary commands on the server. This issue has been patched in version 2.62.2.

Metrics

CVSS 3.1

9.8/10

CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H

EPSS Probability

0.65%

46.7th percentile

Probability of exploitation in the next 30 days. Learn more

Weakness Enumeration

CWE-269

Affected Software

Vendor	Product	Versions
Filebrowser	Filebrowser	< 2.62.2

References

https://github.com/filebrowser/filebrowser/releases/tag/v2.62.2Product, Release Notes
https://github.com/filebrowser/filebrowser/security/advisories/GHSA-x8jc-jvqm-pm3fExploit, Mitigation, Vendor Advisory
https://github.com/filebrowser/filebrowser/security/advisories/GHSA-x8jc-jvqm-pm3fExploit, Mitigation, Vendor Advisory

Timeline

Published: Apr 1, 2026
Last Modified: Jun 17, 2026
Status: Analyzed

Frequently Asked Questions

What is CVE-2026-34528?

How severe is CVE-2026-34528?

CVE-2026-34528 has a CVSS score of 9.8/10 (CRITICAL severity). The EPSS model estimates a 0.65% probability of exploitation in the next 30 days.

How do I fix CVE-2026-34528?

Check the vendor references and advisories linked above for patched versions and mitigation guidance. You can also run a Strix scan to test if your systems are affected.

Are you affected by CVE-2026-34528?

Run a free Strix scan to check your systems for this vulnerability.

Scan your code now

Source: NVD / NIST