CVE-2026-34529: File Browser is vulnerable to Stored Cross-site Scripting via crafted EPUB file

March 31, 2026 (updated April 6, 2026)

The EPUB preview function in File Browser is vulnerable to Stored Cross-site Scripting (XSS). JavaScript embedded in a crafted EPUB file executes in the victim’s browser when they preview the file.

References

github.com/advisories/GHSA-5vpr-4fgw-f69h
github.com/filebrowser/filebrowser
github.com/filebrowser/filebrowser/releases/tag/v2.62.2
github.com/filebrowser/filebrowser/security/advisories/GHSA-5vpr-4fgw-f69h
nvd.nist.gov/vuln/detail/CVE-2026-34529

Code Behaviors & Features

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