FileBrowser Quantum Incomplete Remediation of CVE-2026-27611: Password-Protected Share Bypass via /public/api/share/info
Priority HIGH 72CWE-200Published · Updated
Key facts
- Attack vector
- Network
- Privileges required
- None
- User interaction
- None
- Attack complexity
- Low
- Impact type
- Information disclosure, Security bypass
- Confidentiality · integrity · availability
- High · None · None
- Fix status
- Fixed
Attack profile from CVSS 3.1 · CNA. Fix status from CNA and GitHub. Impact type from CWE-200 and CWE-306.
Summary
FileBrowser Quantum is a free, self-hosted, web-based file manager. Prior to 1.3.1-beta and 1.2.2-stable, the remediation for CVE-2026-27611 is incomplete. Password protected shares still disclose tokenized downloadURL via /public/api/share/info. This vulnerability is fixed in 1.3.1-beta and 1.2.2-stable.
Why it matters now
Exploitation Proof of concept CISA SSVC · not in CISA KEV
EPSS 0.00632 50th percentileScored 2026-11-07
Public exploit Yes 1 exploit referenceTagged by NVD
Fix Fixed filebrowser (gtsteffaniak): 1.3.1-beta, 1.2.2-stablegithub.com/gtsteffaniak/filebrowser/backend (Go): 0.0.0-20260307130210-09713b32a5f6
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
| Vendor | Product | Affected versions | Fixed in | Status | Source |
|---|---|---|---|---|---|
| gtsteffaniak | filebrowser | 1.3.0-beta to before 1.3.1-beta; 1.2.6-beta to before 1.2.2-stable; = 1.1.3-stable | 1.3.1-beta, 1.2.2-stable | Patch available | CNA |
| — | github.com/gtsteffaniak/filebrowser/backend (Go) | before 0.0.0-20260307130210-09713b32a5f6 | 0.0.0-20260307130210-09713b32a5f6 | Patch available | GHSA-525j-95gf-766f |
- filebrowser Vendorgtsteffaniak Affected 1.3.0-beta to before 1.3.1-beta; 1.2.6-beta to before 1.2.2-stable; = 1.1.3-stable Fixed in 1.3.1-beta, 1.2.2-stable Patch available CNA
- github.com/gtsteffaniak/filebrowser/backend (Go) Vendor— Affected before 0.0.0-20260307130210-09713b32a5f6 Fixed in 0.0.0-20260307130210-09713b32a5f6 Patch available GHSA-525j-95gf-766f
CPE configurations NVD · 3
| CPE | Versions | Role | Vendor |
|---|---|---|---|
| cpe:2.3:a:filebrowser:filebrowser:*:*:*:*:*:*:*:* | up to 1.2.9 | Vulnerable | filebrowser |
| cpe:2.3:a:filebrowser:filebrowser:1.2.1:stable:*:*:*:*:*:* | 1.2.1 stable | Vulnerable | filebrowser |
| cpe:2.3:a:filebrowser:filebrowser:1.3.0:beta:*:*:*:*:*:* | 1.3.0 beta | Vulnerable | filebrowser |
- cpe:2.3:a:filebrowser:filebrowser:*:*:*:*:*:*:*:* Versions up to 1.2.9 Vulnerable ·filebrowser
- cpe:2.3:a:filebrowser:filebrowser:1.2.1:stable:*:*:*:*:*:* Versions 1.2.1 stable Vulnerable ·filebrowser
- cpe:2.3:a:filebrowser:filebrowser:1.3.0:beta:*:*:*:*:*:* Versions 1.3.0 beta Vulnerable ·filebrowser
Remediation
- Fix · CNA filebrowser (gtsteffaniak) Fixed in 1.3.1-beta, 1.2.2-stable
- Fix · GHSA-525j-95gf-766f github.com/gtsteffaniak/filebrowser/backend (Go) Fixed in 0.0.0-20260307130210-09713b32a5f6 Advisory →
Timeline
- 2026-10-02 Threatist record created from CVE-2026-30933
- 2026-10-03 Alias added: GHSA-525j-95gf-766f
- 2026-11-05 EPSS moved to the 50th–90th percentile
References
More gtsteffaniak vulnerabilities
- TI-2026-36047 FileBrowser Quantum: Path Traversal in public share PATCH allows file ops outside shared directory CVSS 4.0CRITICAL 9.3
- TI-2026-32454 FileBrowser Quantum: Unauthenticated Path Traversal in Public Share Delete Allows Arbitrary File Deletion CVSS 3.1CRITICAL 9.1
- TI-2026-81497 Symlink following in FileBrowser Quantum exposes out-of-scope files CVSS 3.1HIGH 8.6
- TI-2026-23759 FileBrowser Quantum: Stored XSS in public share page via unsanitized share metadata (text/template misuse) CVSS 3.1HIGH 8.9
- TI-2026-21997 FileBrowser Quantum: Password Protection Not Enforced on Shared File Links CVSS 4.0HIGH 7.1
- TI-2026-39682 FileBrowser Quantum's path traversal issue in subtitle handler allows any authenticated user to read arbitrary files CVSS 3.1HIGH 7.7
Sources
- CVE-2026-30933 · CVE Program
- CVE-2026-30933 · NVD
- FIRST EPSS
- GHSA-525j-95gf-766f · GitHub Advisory Database · CC BY 4.0
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