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TI-2026-32454 Aliases CVE-2026-44542GHSA-fwj3-42wh-8673

FileBrowser Quantum: Unauthenticated Path Traversal in Public Share Delete Allows Arbitrary File Deletion

Priority HIGH 78CWE-22Published · Updated

Key facts

Attack vector
Network
Privileges required
None
User interaction
None
Attack complexity
Low
Impact type
—
Confidentiality · integrity · availability
None · High · High
Fix status
Fixed

Attack profile from CVSS 3.1 · CNA. Fix status from CNA and GitHub.

Summary

FileBrowser Quantum is a free, self-hosted, web-based file manager. Prior to 1.3.1-stable and 1.3.9-beta, attacker-controlled path input is joined with a trusted base path prior to sanitization, allowing traversal sequences (e.g., ../) to escape the intended shared directory. As a result, an unauthenticated attacker possessing a valid public share hash with delete permissions enabled can delete arbitrary files outside the shared directory within the share owner’s configured storage scope. This affects public/api/resources and public/api/resources/bulk. This vulnerability is fixed in 1.3.1-stable and 1.3.9-beta.

Why it matters now

Exploitation Proof of concept CISA SSVC · not in CISA KEV
EPSS 0.00523 44th percentileScored 2026-11-07
Public exploit Yes 1 exploit referenceTagged by NVD
Fix Fixed filebrowser (gtsteffaniak): 1.3.1-stable, 1.3.9-betagithub.com/gtsteffaniak/filebrowser (Go): 0.0.0-20260501183844-112740bdd41d

SSVC decision points

CISA ADP · SSVC 2.0.3

Exploitation
Poc
Automatable
Yes
Technical impact
Partial

The decision (Track, Attend, Act) also depends on your mission and well-being impact; see CISA's SSVC guide.

Affected products

VendorProductAffected versionsFixed inStatusSource
gtsteffaniakfilebrowserbefore 1.3.1-stable; before 1.3.9-beta1.3.1-stable, 1.3.9-betaPatch availableCNA
—github.com/gtsteffaniak/filebrowser (Go)before 0.0.0-20260501183844-112740bdd41d0.0.0-20260501183844-112740bdd41dPatch availableGHSA-fwj3-42wh-8673
  • filebrowser Vendorgtsteffaniak Affected before 1.3.1-stable; before 1.3.9-beta Fixed in 1.3.1-stable, 1.3.9-beta Patch available CNA
  • github.com/gtsteffaniak/filebrowser (Go) Vendor— Affected before 0.0.0-20260501183844-112740bdd41d Fixed in 0.0.0-20260501183844-112740bdd41d Patch available GHSA-fwj3-42wh-8673

CPE configurations NVD · 2

CPEVersionsRoleVendor
cpe:2.3:a:gtsteffaniak:filebrowser_quantum:*:-:*:*:*:*:*:*before 1.3.1Vulnerablegtsteffaniak
cpe:2.3:a:gtsteffaniak:filebrowser_quantum:*:beta:*:*:*:*:*:*before 1.3.9Vulnerablegtsteffaniak
  • cpe:2.3:a:gtsteffaniak:filebrowser_quantum:*:-:*:*:*:*:*:* Versions before 1.3.1 Vulnerable ·gtsteffaniak
  • cpe:2.3:a:gtsteffaniak:filebrowser_quantum:*:beta:*:*:*:*:*:* Versions before 1.3.9 Vulnerable ·gtsteffaniak

Remediation

  • Fix · CNA filebrowser (gtsteffaniak) Fixed in 1.3.1-stable, 1.3.9-beta
  • Fix · GHSA-fwj3-42wh-8673 github.com/gtsteffaniak/filebrowser (Go) Fixed in 0.0.0-20260501183844-112740bdd41d Advisory →

Timeline

  1. 2026-10-02 Threatist record created from CVE-2026-44542
  2. 2026-10-03 Alias added: GHSA-fwj3-42wh-8673

References

Exploit 1

Advisory 1

Other 2

  • TI-2026-21997 FileBrowser Quantum: Password Protection Not Enforced on Shared File Links CVSS 4.0HIGH 7.1

Sources

This product uses the NVD API but is not endorsed or certified by the NVD. Sources and licences