Vulnerability in Filebrowser
CVE-2026-73613
filebrowser versions before 2.63.19 contain an out-of-scope file deletion vulnerability in the TUS upload cache eviction mechanism that allows authenticated users with only Create permission to delete arbitrary files outside their scope. Attackers can swap an ancestor directory with a symlink during the cache TTL window to redirect the raw os.Remove call to an out-of-scope target, bypassing ScopedFs scope guards and Perm.Delete checks.
Published · last modified .
CVSS v3 metric
CVSS v3 base score 8.2 (High). Vector: CVSS:3.1/AV:N/AC:H/PR:L/UI:N/S:C/C:N/I:H/A:H.
EPSS exploit prediction
EPSS: 0.006 (44.1th percentile), scored .
Very low probability of exploitation in the next 30 days; routine patching cadence is appropriate. 44th percentile — 44.1% of CVEs in the catalogue have a lower EPSS than this one. How to read EPSS.
EPSS over last 30 days · oldest: 0.004 · newest: 0.006 · change: +0.002
Affected products
- Filebrowser — versions 0, 2.63.19
Weakness classification (CWE)
References
- github.com/filebrowser/filebrowser/security/advisories/GHSA-m9f5-2232-frp6 (vendor-advisory)
- www.vulncheck.com/advisories/filebrowser-before-out-of-scope-file-deletion-via-… (third-party-advisory)
Frequently asked questions
- What is CVE-2026-73613?
- CVE-2026-73613 is a high-severity vulnerability in Filebrowser, classified under Improper Link Resolution Before File Access. CVSS score: 8.2/10. Published 2026-08-13.
- How severe is CVE-2026-73613?
- High severity. CVSS v3 base score is 8.2 out of 10.