# CVE-2026-46410: FileBrowser Quantum information disclosure to unauthenticated users

Source: https://junglewise.ai/threats/cve-2026-46410-filebrowser-quantum-information-disclosure-to-unauthenticated  
Publisher: Junglewise Threat Intelligence, https://junglewise.ai/threats  
Published: 2026-07-20. Updated: 2026-07-20  
License: CC BY 4.0 with a link back

CVE-2026-46410 · Severity: high · CVSS 4 · Published 2026-07-20

FileBrowser Quantum, a self-hosted web-based file management system, contains a vulnerability that allows unauthorized users to view sensitive system information. An attacker could gain access to internal file paths and source details without needing to log in. This exposure could help an attacker map out the server's internal structure for further exploitation.

Technologies: [github.com/gtsteffaniak/filebrowser (Go)](https://junglewise.ai/threats/technologies/github-com-gtsteffaniak-filebrowser), [github.com/gtsteffaniak/filebrowser/backend (Go)](https://junglewise.ai/threats/technologies/github-com-gtsteffaniak-filebrowser-backend), [Gtsteffaniak FileBrowser Quantum](https://junglewise.ai/threats/technologies/filebrowser-quantum). Vendors: [Go](https://junglewise.ai/threats/vendors/go), [Gtsteffaniak](https://junglewise.ai/threats/vendors/gtsteffaniak).

## Quick answers

**Is CVE-2026-46410 exploited in the wild?** No. Junglewise Threat Intelligence has no report of CVE-2026-46410 being exploited in the wild.

**How severe is CVE-2026-46410?** High severity, with a CVSS score of 4, published 20 July 2026.

**Which products and versions are affected?** github.com/gtsteffaniak/filebrowser (Go) < 1.2.1-stable.0.20260514154726-1802e1281135, SEMVER:introduced=0,fixed=1.2.1-stable.0.20260514154726-1802e1281135; github.com/gtsteffaniak/filebrowser/backend (Go) < 0.0.0-20260514154726-1802e1281135, SEMVER:introduced=0,fixed=0.0.0-20260514154726-1802e1281135; Gtsteffaniak FileBrowser Quantum < 1.3.2-stable, < 1.4.1-beta, <= 1.3.1-stable, <= 1.4.0-beta.

**Is there a fix for CVE-2026-46410?** Yes. github.com/gtsteffaniak/filebrowser (Go): upgrade to 1.2.1-stable.0.20260514154726-1802e1281135 or later; github.com/gtsteffaniak/filebrowser/backend (Go): upgrade to 0.0.0-20260514154726-1802e1281135 or later. Junglewise finds every place you run it, drafts the upgrade and applies it once you approve.

**How is CVE-2026-46410 attacked?** It is attacked over the network, in a network appliance.

**Am I affected by CVE-2026-46410?** Check whether you run github.com/gtsteffaniak/filebrowser (Go), github.com/gtsteffaniak/filebrowser/backend (Go) or Gtsteffaniak FileBrowser Quantum at an affected version. Junglewise does that check for you around the clock: connect your code, cloud and domains, and it matches new vulnerabilities like this one against what you actually run and tells you when one reaches you.

## How to fix

- github.com/gtsteffaniak/filebrowser (Go): upgrade to 1.2.1-stable.0.20260514154726-1802e1281135 or later

  ```sh
  go get github.com/gtsteffaniak/filebrowser@v1.2.1-stable.0.20260514154726-1802e1281135
  ```

- github.com/gtsteffaniak/filebrowser/backend (Go): upgrade to 0.0.0-20260514154726-1802e1281135 or later

  ```sh
  go get github.com/gtsteffaniak/filebrowser/backend@v0.0.0-20260514154726-1802e1281135
  ```


## Technical details

FileBrowser Quantum prior to versions 1.3.2-stable and 1.4.1-beta contains an information disclosure vulnerability (CWE-200). The flaw allows an unauthenticated remote attacker to access sensitive metadata, specifically internal file system paths and source information. This occurs due to insufficient access controls on certain information-sharing components. Attackers can exploit this over the network without user interaction to facilitate reconnaissance. The issue is resolved in versions 1.3.2-stable and 1.4.1-beta.

## Affected products

- gtsteffaniak FileBrowser Quantum < 1.3.2-stable, < 1.4.1-beta

## Identifiers

- CVE-2026-46410
- GHSA-3jmg-p96m-m328
- GO-2026-5089

## Timeline

- 2026-05-14: advisory: GitHub Security Advisory published
- 2026-07-20: disclosed: CVE published to NVD

## References

- [https://github.com/gtsteffaniak/filebrowser/commit/1802e1281135cba83eb4acd86b58293fe121e2a5](https://github.com/gtsteffaniak/filebrowser/commit/1802e1281135cba83eb4acd86b58293fe121e2a5)
- [https://github.com/gtsteffaniak/filebrowser/security/advisories/GHSA-3jmg-p96m-m328](https://github.com/gtsteffaniak/filebrowser/security/advisories/GHSA-3jmg-p96m-m328)

## Related threats

- [FileBrowser symlink escape vulnerability in file read operations](https://junglewise.ai/threats/cve-2026-116682-filebrowser-quantum-is-a-free-self-hosted-web-based-file-manager)
- [gtsteffaniak FileBrowser Quantum path traversal in subtitlesHandler](https://junglewise.ai/threats/cve-2026-54910-gtsteffaniak-filebrowser-quantum-path-traversal-in)
- [gtsteffaniak FileBrowser Quantum username enumeration via timing side-channel](https://junglewise.ai/threats/cve-2026-54685-gtsteffaniak-filebrowser-quantum-username-enumeration-via-timing)
- [GO-2026-5776 - FileBrowser: Missing Rate Limiting on Authentication Endpoint Enables Brute Force Attacks in…](https://junglewise.ai/threats/go-2026-5776-filebrowser-missing-rate-limiting-on-authentication-b2b87eb2)
- [GO-2026-5511 - FileBrowser Vulnerable to Stored XSS via SVG File in Public Share (Missing CSP Header) in…](https://junglewise.ai/threats/go-2026-5511-filebrowser-vulnerable-to-stored-xss-via-svg-file-in-f1d3c87e)