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VulnerabilityPublished Updated

CVE-2026-27611: gtsteffaniak filebrowser · Information Exposure

Affects gtsteffaniak filebrowserSource CVE Database V5

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Not known to be exploited · CVSS 7.1 High : upgrade to 1.2.6-beta or 1.1.3-stable soon.

Data as of 30 Oct 2026, 06:59 UTC

CVSS 4.0 base score
7.1High
How severe the flaw is on the 0–10 CVSS scale.
EPSS
0.3% chance of exploitation in 30 days – higher than 30% of CVEsExploit Prediction Scoring System: the likelihood attackers will use this flaw soon.
Patch
Available – fixed in 1.2.6-beta, 1.1.3-stable
CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:P/VC:H/VI:L/VA:N/SC:N/SI:N/SA:N

Exploitation evidence

  1. Disclosed: evidence found.

    CVE published 25 Feb 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 29 Oct 2026.

What to do

Upgrade gtsteffaniak filebrowser to 1.2.6-beta or 1.1.3-stable.

Affected software

ProductAffectedFixed in
gtsteffaniakfilebrowserAffected
  • >=1.2.0-beta <1.2.6-beta
Fixed in
  • 1.2.6-beta
gtsteffaniakfilebrowserAffected
  • <1.1.3-stable
Fixed in
  • 1.1.3-stable
GitHubgtsteffaniak/filebrowserpkg:github/gtsteffaniak/filebrowserOther threatsAffected
  • =1.1.3-stable
  • =1.1.3-stable
Fixed in–

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

AI-suggested

Organizations should immediately upgrade FileBrowser Quantum to version 1.1.3-stable or 1.2.6-beta or later, where the vulnerability is fixed. Until upgrades are applied, administrators should avoid sharing password-protected files via the vulnerable versions or disable sharing features if possible. Review and audit existing shared links to identify and revoke any that may expose sensitive data. Implement network-level access controls to restrict access to the FileBrowser instance, such as VPNs or IP whitelisting, to reduce exposure. Monitor logs for unusual download activity or access patterns that could indicate exploitation attempts. Educate users about the risks of sharing links and encourage use of additional encryption or secure transfer methods. Consider deploying Web Application Firewalls (WAFs) with custom rules to detect and block unauthorized API access if immediate patching is not feasible. Regularly review and update security policies around file sharing and access control to prevent similar issues.

Description

FileBrowser Quantum is a free, self-hosted, web-based file manager. Prior to versions 1.1.3-stable and 1.2.6-beta, when users share password-protected files, the recipient can completely bypass the password and still download the file. This happens because the API returns a direct download link in the details of the share, which is accessible to anyone with JUST THE SHARE LINK, even without the password. Versions 1.1.3-stable and 1.2.6-beta fix the issue.

References

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