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.
Published · last modified .
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.
EPSS exploit prediction
EPSS: 0.005 (42.8th percentile), scored .
Very low probability of exploitation in the next 30 days; routine patching cadence is appropriate. 43rd percentile — 42.8% of CVEs in the catalogue have a lower EPSS than this one. How to read EPSS.
EPSS over last 30 days · oldest: 0.005 · newest: 0.005 · change: 0.000
Affected products
Weakness classification (CWE)
References
- github.com/filebrowser/filebrowser/security/advisories/GHSA-7w29-q235-57m9 (vendor-advisory)
- www.vulncheck.com/advisories/file-browser-through-2.63.23-path-traversal-via-sy… (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.