What is CVE-2026-90930?

CVE-2026-90930 is a medium-severity vulnerability in Filebrowser, classified under Improper Link Resolution Before File Access. CVSS score: 6.8/10. Published 2026-09-14.

How severe is CVE-2026-90930?

Medium severity. CVSS v3 base score is 6.8 out of 10.

Vulnerability in Filebrowser

CVE-2026-90930

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 v3 metric

CVSS v3 base score 6.8 (Medium). Vector: CVSS:3.1/AV:N/AC:H/PR:L/UI:N/S:U/C:H/I:H/A:N.

Affected products

Filebrowser

Weakness classification (CWE)

CWE-59 — Improper Link Resolution Before File Access

References

disclosure@vulncheck.com (vendor-advisory)
disclosure@vulncheck.com (third-party-advisory)

Frequently asked questions

What is CVE-2026-90930?: CVE-2026-90930 is a medium-severity vulnerability in Filebrowser, classified under Improper Link Resolution Before File Access. CVSS score: 6.8/10. Published 2026-09-14.
How severe is CVE-2026-90930?: Medium severity. CVSS v3 base score is 6.8 out of 10.