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Vulnerability record · CVE-2026-90930 · published 14 September 2026

CVE-2026-90930: Link following vulnerability

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.

7.6 CVSS 4.0 High EPSS 0.50% · top 59.6% CWE-59 · Link following Awaiting Analysis
7.6CVSS 4.0 base score
0.50%EPSS exploitation probability, 30 days
NoNot in CISA KEV
0Affected product versions listed by NVD
3References
24 Sep 2026Last modified by NVD

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:4.0/AV:N/AC:H/AT:P/PR:L/UI:N/VC:H/VI:H/VA:N/SC:N/SI:N/SA:N/E:X/CR:X/IR:X/AR:X/MAV:X/MAC:X/MAT:X/MPR:X/MUI:X/MVC:X/MVI:X/MVA:X/MSC:X/MSI:X/MSA:X/S:X/AU:X/R:

References

LinkTags
https://github.com/filebrowser/filebrowser/security/advisories/GHSA-7w29-q235-57m9
https://www.vulncheck.com/advisories/file-browser-through-2.63.23-path-traversal-via-symlink-alias
https://github.com/filebrowser/filebrowser/security/advisories/GHSA-7w29-q235-57m9

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Source: NIST National Vulnerability Database (record CVE-2026-90930), CISA KEV, FIRST EPSS (scores of 2026-09-27). This page is refreshed as NVD updates the record.