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VulnerabilityPublished

CVE-2026-44542: gtsteffaniak filebrowser · Path Traversal

Affects gtsteffaniak filebrowserSource CVE Database V5

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Not known to be exploited · CVSS 9.1 Critical : upgrade to 1.3.9-beta or 1.3.1-stable as a priority.

Data as of 10 Nov 2026, 23:24 UTC

CVSS 3.1 base score
9.1Critical
How severe the flaw is on the 0–10 CVSS scale.

Contested

Critical score, yet low EPSS after six months
EPSS
0.5% chance of exploitation in 30 days – higher than 44% of CVEsExploit Prediction Scoring System: the likelihood attackers will use this flaw soon.
Patch
Available – fixed in 1.3.9-beta, 1.3.1-stable
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:H/A:H

Exploitation evidence

  1. Disclosed: evidence found.

    CVE published 14 May 2026

  2. Detectable: no evidence on record.

    No public nuclei template indexed

  3. Weaponized: no evidence on record.

    No public exploit code indexed in Metasploit or Exploit-DB

  4. Exploited in the wild: no evidence on record.

    Not in CISA KEV and no source reports exploitation

  5. Observed by OffSeq Mirage: no evidence on record.

    No attack traffic recorded by OffSeq Mirage sensors

A missing step is not evidence of safety. Sources: cve.org (opens in a new tab), the Metasploit, Exploit-DB and nuclei-templates index as of 10 Nov 2026.

What to do

Upgrade gtsteffaniak filebrowser to 1.3.9-beta or 1.3.1-stable.

Affected software

ProductAffectedFixed in
gtsteffaniakfilebrowserAffected
  • <1.3.9-beta
Fixed in
  • 1.3.9-beta
gtsteffaniakfilebrowserAffected
  • <1.3.1-stable
Fixed in
  • 1.3.1-stable
GitHubgtsteffaniak/filebrowserpkg:github/gtsteffaniak/filebrowserOther threatsAffected
  • =1.3.1-stable
  • =1.3.9-beta
Fixed in–

Check your own hosts for these packages with threat-finder (opens in a new tab), our free open-source scanner.

AI-suggested

This vulnerability is fixed in FileBrowser Quantum versions 1.3.1-stable and 1.3.9-beta. Users should upgrade to these or later versions to remediate the issue. Patch status is not explicitly stated in a vendor advisory but the description confirms the fix in these versions. No additional mitigations are specified.

Description

CVE-2026-44542 is a critical path traversal vulnerability in gtsteffaniak's FileBrowser Quantum versions prior to 1.3.1-stable and 1.3.9-beta. The flaw allows an unauthenticated attacker with a valid public share hash and delete permissions to delete arbitrary files outside the intended shared directory by exploiting improper sanitization of attacker-controlled path input. This affects the public/api/resources and public/api/resources/bulk endpoints. The vulnerability is fixed in versions 1.3.1-stable and 1.

References

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