GHSA-mmpx-jh39-wrv6: FileBrowser Vulnerable to Stored XSS via SVG File in Public Share (Missing CSP Header)

May 7, 2026

FileBrowser Quantum serves inline SVG files without a Content-Security-Policy header, allowing embedded JavaScript in SVG files to execute when accessed via public share links.

Verified on v1.3.0-stable.

References

github.com/advisories/GHSA-mmpx-jh39-wrv6
github.com/gtsteffaniak/filebrowser/commit/6bfc3974192e954f71cc5d1cd04baaaec3b76383
github.com/gtsteffaniak/filebrowser/security/advisories/GHSA-mmpx-jh39-wrv6

Code Behaviors & Features

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