High 8.9Published Mar 10, 2026

CVE-2026-30934FileBrowser Quantum: Stored XSS in public share page via unsanitized share metadata (text/template misuse)

Updated under an hour ago (Oct 27, 2026, 1:00 PM ET)

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It affects gtsteffaniak filebrowser and 1 other product. Add what you run to find out whether that includes you.

No exploitation reported and no EPSS estimate yet.

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Every CVE for gtsteffaniak filebrowser

Exploited in the last 30 days

FileBrowser Quantum is a free, self-hosted, web-based file manager. Prior to 1.3.1-beta and 1.2.2-stable, Stored XSS is possible via share metadata fields (e.g., title, description) that are rendered into HTML for /public/share/<hash> without context-aware escaping. The server uses text/template instead of html/template, allowing injected scripts to execute when victims visit the share URL. This vulnerability is fixed in 1.3.1-beta and 1.2.2-stable.

CVSS: 8.9 HIGH (v3.1, CNA)CVSS:3.1/AV:N/AC:L/PR:L/UI:R/S:C/C:H/I:H/A:L
Weakness (CWE): CWE-79
Known exploited: Not in CISA's KEV catalog
EPSS (exploitation in the next 30 days): Not loaded for this CVE
Assigned by: GitHub_M
NVD analysis: Analyzed
Record last updated: Mar 10, 2026
First seen by InfoSec Signals: Oct 9, 2026

Affected products

Affected products

gtsteffaniak filebrowser gtsteffaniak:filebrowser (from the name)	from 1.3.0-beta, < 1.3.1-beta; before 1.2.2-stable	CNA record
filebrowser filebrowser filebrowser:filebrowser	through 1.2.9; 1.2.1; 1.3.0	NVD

References

References

https://github.com/gtsteffaniak/filebrowser/security/advisories/GHSA-r633-fcgp-m532	x-refsource-confirm, exploit, vendor-advisory
https://github.com/gtsteffaniak/filebrowser/releases/tag/v1.2.2-stable	x-refsource-misc, release-notes
https://github.com/gtsteffaniak/filebrowser/releases/tag/v1.3.1-beta	x-refsource-misc, release-notes

The CVE record on cve.org NVD's entry

The CVE record is authoritative. Products marked “from the name” were identified from the CNA's free-text names, not a CPE, and are matched less certainly. This product uses the NVD API but is not endorsed or certified by the NVD.