---
title: "CVE-2026-32760: File Browser Signup Grants Admin When Default Permissions Include Admin"
url: https://erroneo.us/security/cve/CVE-2026-32760/
description: "CVE-2026-32760 (github.com/filebrowser/filebrowser/v2 (Go)): File Browser is a file managing interface for uploading, deleting, previewing, renaming, and…"
type: vulnerability-record
section: "Security Digest"
date_published: 2026-03-19
date_modified: 2026-03-25
publisher: erroneo.us
author: erroneo.us Security Desk
cve: "CVE-2026-32760"
kev: false
cvss: 10
epss: 0.00717
license: All rights reserved. Quote with attribution and a link.
---

# CVE-2026-32760: File Browser Signup Grants Admin When Default Permissions Include Admin

**Signal:** Critical and remotely reachable. No known exploitation yet, but it is network-reachable without credentials. (Computed from CISA KEV, EPSS and CVSS; not an editorial verdict.)

## Should you act?

- Not in CISA KEV , but CISA’s SSVC assessment records a public proof-of-concept, so attack code exists.
- EPSS 0.7% , percentile 53: FIRST’s model estimates a 0.7% chance of exploitation activity in the next 30 days, higher than 53% of all scored CVEs (moderate). EPSS is a probability, not a verdict.
- Remotely reachable with no login and no user interaction. If the vulnerable service is exposed to the internet, prioritize it.
- Only applies if your dependency tree includes github.com/filebrowser/filebrowser/v2 (Go) <= 2.61.2, fixed in 2.62.0 . Check your lockfile, including transitive dependencies.

## What it is

File Browser is a file managing interface for uploading, deleting, previewing, renaming, and editing files within a specified directory. In versions 2.61.2 and below, any unauthenticated visitor can register a full administrator account when self-registration (signup = true) is enabled and the default user permissions have perm.admin = true. The signup handler blindly applies all default settings (including Perm.Admin) to the new user without any server-side guard that strips admin from self-registered accounts. The signupHandler is supposed to create unprivileged accounts for new visitors. It contains no explicit user.Perm.Admin = false reset after applying defaults. If an administrator (intentionally or accidentally) configures defaults.perm.admin = true and also enables signup, every account created via the public registration endpoint is an administrator with full control over all files, users, and server settings. This issue has been resolved in version 2.62.0.

## Affected packages

- Go `github.com/filebrowser/filebrowser/v2` <= 2.61.2 → fixed: 2.62.0

## Affected products (CVE record)

- filebrowser filebrowser: < 2.62.0

## Severity

- GitHub_M CVSS 4.0: 10 `CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:H/VI:H/VA:H/SC:H/SI:H/SA:H`
- GitHub CVSS 4.0: 10.0 `CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:H/VI:H/VA:H/SC:H/SI:H/SA:H`

## Exploitation

- CISA KEV: not listed (no confirmed in-the-wild exploitation known to CISA).
- CISA SSVC assessment: exploitation poc , automatable yes , technical impact total .
- FIRST EPSS (model of 2026-10-21): 0.72% probability of exploitation activity in the next 30 days; percentile 53.

## Sources

- [GitHub Advisory GHSA-5gg9-5g7w-hm73](https://github.com/advisories/GHSA-5gg9-5g7w-hm73)
- [CVE.org record CVE-2026-32760](https://www.cve.org/CVERecord?id=CVE-2026-32760)
- [NVD entry CVE-2026-32760](https://nvd.nist.gov/vuln/detail/CVE-2026-32760)
- [github.com](https://github.com/filebrowser/filebrowser/security/advisories/GHSA-5gg9-5g7w-hm73)
- [github.com](https://github.com/filebrowser/filebrowser/commit/a63573b67eb302167b4c4f218361a2d0c138deab)
- [github.com](https://github.com/filebrowser/filebrowser/releases/tag/v2.62.0)

---
Source page: https://erroneo.us/security/cve/CVE-2026-32760/ · Security Digest: https://erroneo.us/security/ · More: https://erroneo.us/llms.txt