Critical severity · published Apr 1, 2026
CVE-2026-34529
File Browser is vulnerable to Stored Cross-site Scripting via crafted EPUB file
9.0
CVSS
0.3%
EPSS
No
On KEV
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 vector
CVSS:3.1/AV:N/AC:L/PR:L/UI:R/S:C/C:H/I:H/A:H
Attack vector
Network
Complexity
Low
Privileges
Low
User interaction
Required
Confidentiality
High
Integrity
High
Availability
High
Scope
Changed
Exploitation
Is it being used?
Exploit prediction (EPSS)0.3% · higher than 25% of CVEs
Exploited in the wildNo evidence yet
CISA KEVNot listed
Ransomware campaign useNot known
Affected products
Which versions
FI
filebrowser · filebrowser
< 2.62.2 · source: vendor, NVD
References
NVD
https://nvd.nist.gov/vuln/detail/CVE-2026-34529
CVE.org
https://www.cve.org/CVERecord?id=CVE-2026-34529
Product
https://github.com/filebrowser/filebrowser/releases/tag/v2.62.2
Exploit
https://github.com/filebrowser/filebrowser/security/advisories/GHSA-5vpr-4fgw-f69h
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