PT-2026-38413 · Unknown · Filebrowser Quantum

Yesuhei · Published 2026-05-01 · Updated 2026-06-25 · CVE-2026-44542

Positive Technologies (AI Summary)

CVSS v3.1

9.4

Critical

Base vector

AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:H/A:H

Name of the Vulnerable Software and Affected Versions FileBrowser Quantum versions prior to 1.3.1-stable FileBrowser Quantum versions prior to 1.3.9-beta

Description Attacker-controlled path input is joined with a trusted base path before sanitization, enabling the use of traversal sequences such as ../ to escape the intended shared directory. An unauthenticated attacker with a valid public share hash and delete permissions can delete arbitrary files outside the shared directory within the storage scope of the share owner. This issue affects the 'public/api/resources' and 'public/api/resources/bulk' endpoints, specifically involving the path parameter.

Recommendations Update to version 1.3.1-stable. Update to version 1.3.9-beta.

Exploit

Fix

Path traversal

Weakness Enumeration

CWE-22

Related Identifiers

BDU:2026-07993

CVE-2026-44542

GHSA-FWJ3-42WH-8673

GO-2026-5383

Affected Products

Filebrowser Quantum

References · 10

• 🔥 https://github.com/gtsteffaniak/filebrowser/security/advisories/GHSA-fwj3-42wh-8673 · Exploit
• https://nvd.nist.gov/vuln/detail/CVE-2026-44542 · Security Note
• https://osv.dev/vulnerability/GHSA-fwj3-42wh-8673 · Vendor Advisory
• https://osv.dev/vulnerability/GO-2026-5383 · Vendor Advisory
• https://bdu.fstec.ru/vul/2026-07993 · Security Note
• https://github.com/gtsteffaniak/filebrowser/commit/112740bdd41de7d5eb01e13ba49d406bfc463f69 · Note
• https://github.com/gtsteffaniak/filebrowser · Note
• https://t.me/cveNotify/168840 · Telegram Post
• https://twitter.com/CCBalert/status/2067250475905249775 · Twitter Post
• https://reddit.com/r/VulnMatter/comments/1t691c5/resumen_diario_de_vulnerabilidades_07052026 · Reddit Post