Medium severity · published Sep 14, 2026
CVE-2026-90930
File Browser through 2.63.23 Path Traversal via Symlink Alias
6.8
CVSS
0.5%
EPSS
No
On KEV
Description
File Browser through 2.63.23 applies path rules to the requested lexical path but resolves symbolic links without reapplying rules to the target, allowing authenticated users to bypass deny rules. Attackers can read and overwrite rule-denied files by accessing them through in-scope symbolic link aliases that resolve to denied paths.
CVSS vector
CVSS:3.1/AV:N/AC:H/PR:L/UI:N/S:U/C:H/I:H/A:N
Attack vector
Network
Complexity
High
Privileges
Low
User interaction
None
Confidentiality
High
Integrity
High
Availability
None
Scope
Unchanged
Exploitation
Is it being used?
Exploit prediction (EPSS)0.5% · higher than 43% of CVEs
Exploited in the wildNo evidence yet
CISA KEVNot listed
Ransomware campaign useNot known
Affected products
Which versions
FI
filebrowser · filebrowser
through 2.63.23 · source: vendor
References
NVD
https://nvd.nist.gov/vuln/detail/CVE-2026-90930
CVE.org
https://www.cve.org/CVERecord?id=CVE-2026-90930
github.com
https://github.com/filebrowser/filebrowser/security/advisories/GHSA-7w29-q235-57m9
www.vulncheck.com
https://www.vulncheck.com/advisories/file-browser-through-2.63.23-path-traversal-via-symlink-alias
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