How severe is CVE-2026-27611?

CVE-2026-27611 has a CVSS 3.x base score of 6.5, rated medium severity. It is exploitable over network with low attack complexity, requires no privileges and user interaction. Impact on confidentiality is high, integrity none, and availability none.

Is CVE-2026-27611 being actively exploited?

It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 0% (22nd percentile), an estimate of the probability of exploitation in the next 30 days.

What products are affected by CVE-2026-27611?

CVE-2026-27611 primarily affects Gtsteffaniak Filebrowser Quantum. In total, 2 product configurations (CPEs) are listed as vulnerable; see the affected-products list for the exact versions.

How do I fix CVE-2026-27611?

Review the linked vendor and NVD advisories for patched versions and mitigations, then upgrade or apply the recommended workaround.

Does CVE-2026-27611 have an EU (EUVD) identifier?

Yes. CVE-2026-27611 is tracked in the ENISA EU Vulnerability Database (EUVD) as EUVD-2026-8594.

When was CVE-2026-27611 published?

CVE-2026-27611 was published on 2026-02-25 and last updated on 2026-06-17.

CVE-2026-27611

CVE-2026-27611 is a medium-severity vulnerability in Gtsteffaniak Filebrowser Quantum with a CVSS 3.x base score of 6.5. It is not currently listed as actively exploited by CISA, and its EPSS exploit-prediction score is low. The underlying weakness is classified as CWE-200.

Key facts

Severity: Medium (CVSS 3.x base score 6.5)
CVSS v4: 7.1
EPSS exploit prediction: 0% (22nd percentile)
Actively exploited: Not listed in CISA KEV
EU (EUVD) id: EUVD-2026-8594
Weakness: CWE-200
Affected product: Gtsteffaniak Filebrowser Quantum
Published: 2026-02-25
Last modified: 2026-06-17

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.

Frequently asked questions

What is CVE-2026-27611?: 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.
How severe is CVE-2026-27611?: CVE-2026-27611 has a CVSS 3.x base score of 6.5, rated medium severity. It is exploitable over network with low attack complexity, requires no privileges and user interaction. Impact on confidentiality is high, integrity none, and availability none.
Is CVE-2026-27611 being actively exploited?: It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 0% (22nd percentile), an estimate of the probability of exploitation in the next 30 days.
What products are affected by CVE-2026-27611?: CVE-2026-27611 primarily affects Gtsteffaniak Filebrowser Quantum. In total, 2 product configurations (CPEs) are listed as vulnerable; see the affected-products list for the exact versions.
How do I fix CVE-2026-27611?: Review the linked vendor and NVD advisories for patched versions and mitigations, then upgrade or apply the recommended workaround.
Does CVE-2026-27611 have an EU (EUVD) identifier?: Yes. CVE-2026-27611 is tracked in the ENISA EU Vulnerability Database (EUVD) as EUVD-2026-8594.
When was CVE-2026-27611 published?: CVE-2026-27611 was published on 2026-02-25 and last updated on 2026-06-17.

References

Affected products (2)

cpe:2.3:a:gtsteffaniak:filebrowser_quantum:*:*:*:*:*:*:*:*
cpe:2.3:a:gtsteffaniak:filebrowser_quantum:1.1.3:beta:*:*:*:*:*:*

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