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CVE-2026-35604

Filebrowser broken access control

8.1 HIGHPublic exploitEPSS 0.43%
  1. Published7 Apr 2026

Description

File Browser is a file managing interface for uploading, deleting, previewing, renaming, and editing files within a specified directory. Prior to 2.63.1, when an admin revokes a user's Share and Download permissions, existing share links created by that user remain fully accessible to unauthenticated users. The public share download handler does not re-check the share owner's current permissions. This vulnerability is fixed in 2.63.1.

CVSS 3.1 breakdown

Attack vectorNetwork
Attack complexityLow
Privileges requiredLow
User interactionNone
ScopeUnchanged
ConfidentialityHigh
IntegrityHigh
AvailabilityNone
CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:N

Affected products

Filebrowser< 2.63.1

Remediation

Fixed in
Filebrowser≥ 2.63.1

References

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Frequently asked

Is CVE-2026-35604 being actively exploited?

CVE-2026-35604 is not in the CISA KEV catalog. A public exploit reference exists, so treat it as exploitable. Its EPSS exploit probability is 0.43%.

How severe is CVE-2026-35604?

CVE-2026-35604 has a CVSS 3.1 base score of 8.1, rated high. EPSS estimates a 0.43% probability of exploitation.

Which products are affected by CVE-2026-35604?

Affected products include Filebrowser.

How do I fix CVE-2026-35604?

Upgrade affected software to a fixed version, for example Filebrowser 2.63.1 or later, then confirm no affected versions remain in your inventory.

How Secuno handles this

Secuno correlates vulnerabilities like CVE-2026-35604 against the real software inventory on every managed device, every day. Rather than a static severity, each match is scored in context: exploit availability, EPSS, the asset's exposure, and business criticality decide where it lands in the queue. If an affected version is present anywhere across your portfolio, it surfaces automatically with a prioritised remediation path.

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Data from the NVD, CISA KEV catalog and FIRST EPSS. CVSS 3.1 base score shown where available.