CVE-2026-116682: FileBrowser symlink escape vulnerability in file read operations

CVE-2026-116682 · Severity: high · CVSS 8.6 · Published 2026-10-27

FileBrowser is a self-hosted web-based file manager that allows users to browse and download files. A vulnerability in symlink handling allows authenticated users and public-share holders to read files outside their authorized scope by following symbolic links to out-of-bounds targets. This could expose sensitive server files to unauthorized access.

Technologies: github.com/gtsteffaniak/filebrowser/backend (Go). Vendors: Go, Gtsteffaniak.

Quick answers

Is CVE-2026-116682 exploited in the wild?
No. Junglewise Threat Intelligence has no report of CVE-2026-116682 being exploited in the wild.
How severe is CVE-2026-116682?
High severity, with a CVSS score of 8.6, published 27 October 2026.
Which products and versions are affected?
github.com/gtsteffaniak/filebrowser/backend (Go) < 0.0.0-20260814233832-4126edeb07a0, SEMVER:introduced=0,fixed=0.0.0-20260814233832-4126edeb07a0; Gtsteffaniak FileBrowser before 1.5.2-stable and before 2.0.1-beta.
Is there a fix for CVE-2026-116682?
Yes. github.com/gtsteffaniak/filebrowser/backend (Go): upgrade to 0.0.0-20260814233832-4126edeb07a0 or later. Junglewise finds every place you run it, drafts the upgrade and applies it once you approve.
How is CVE-2026-116682 attacked?
It is attacked over the network, in a web application.
Am I affected by CVE-2026-116682?
Check whether you run github.com/gtsteffaniak/filebrowser/backend (Go) or Gtsteffaniak FileBrowser 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/backend (Go): upgrade to 0.0.0-20260814233832-4126edeb07a0 or later
    go get github.com/gtsteffaniak/filebrowser/backend@v0.0.0-20260814233832-4126edeb07a0

Technical details

The vulnerability exists in backend/pkg/indexing/indexingFiles.go where GetRealPath resolves symbolic links without validating that the resolved target remains within the source root and user's authorized scope. Multiple read flows (download, preview, media, OnlyOffice, public-share) that enable FollowSymlinks are affected. An authenticated user with download access or a public-share holder can exploit reachable in-scope symlinks to access out-of-scope files.

Affected products

  • gtsteffaniak FileBrowser before 1.5.2-stable and before 2.0.1-beta

Identifiers

  • CVE-2026-116682
  • GHSA-mgqf-5mf5-prfj
  • GO-2026-6870

Timeline

  • 2026-10-27: disclosed

References

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