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CVE-2026-34529

Filebrowser cross-site scripting (XSS)

7.6 HIGHPublic exploitEPSS 0.39%
  1. Published1 Apr 2026

Description

File Browser is a file managing interface for uploading, deleting, previewing, renaming, and editing files within a specified directory. Prior to version 2.62.2, the EPUB preview function in File Browser is vulnerable to Stored Cross-Site Scripting (XSS). JavaScript embedded in a crafted EPUB file executes in the victim's browser when they preview the file. This issue has been patched in version 2.62.2.

CVSS 3.1 breakdown

Attack vectorNetwork
Attack complexityLow
Privileges requiredLow
User interactionRequired
ScopeChanged
ConfidentialityHigh
IntegrityLow
AvailabilityNone
CVSS:3.1/AV:N/AC:L/PR:L/UI:R/S:C/C:H/I:L/A:N

Affected products

Filebrowser< 2.62.2

Remediation

Fixed in
Filebrowser≥ 2.62.2

References

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Frequently asked

Is CVE-2026-34529 being actively exploited?

CVE-2026-34529 is not in the CISA KEV catalog. A public exploit reference exists, so treat it as exploitable. Its EPSS exploit probability is 0.39%.

How severe is CVE-2026-34529?

CVE-2026-34529 has a CVSS 3.1 base score of 7.6, rated high. EPSS estimates a 0.39% probability of exploitation.

Which products are affected by CVE-2026-34529?

Affected products include Filebrowser.

How do I fix CVE-2026-34529?

Upgrade affected software to a fixed version, for example Filebrowser 2.62.2 or later, then confirm no affected versions remain in your inventory.

How Secuno handles this

Secuno correlates vulnerabilities like CVE-2026-34529 against the real software inventory on every managed device, as each hourly inventory arrives. 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.