What is CVE-2026-73612?

CVE-2026-73612 is a high-severity vulnerability in Filebrowser, classified under Authorization Bypass Through User-Controlled Key. CVSS score: 8.1/10. Published 2026-08-13.

How severe is CVE-2026-73612?

High severity. CVSS v3 base score is 8.1 out of 10.

Auth bypass in Filebrowser

CVE-2026-73612

File Browser before v2.63.22 fails to validate access rules for descendants during recursive copy, rename, and delete operations, allowing authenticated users to bypass path-based access controls. Attackers can copy, rename, or delete denied files by operating on their allowed parent directory, defeating rule-based isolation for confidentiality and integrity.

Vulnerability class: IDOR (Insecure Direct Object Reference)

Published 2026-08-13 · last modified 2026-09-08.

CVSS v3 metric

CVSS v3 base score 8.1 (High). Vector: CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:N.

EPSS exploit prediction

EPSS: 0.005 (38.6th percentile), scored 2026-09-27.

Very low probability of exploitation in the next 30 days; routine patching cadence is appropriate. 39th percentile — 38.6% of CVEs in the catalogue have a lower EPSS than this one. How to read EPSS.

EPSS over last 30 days · oldest: 0.003 · newest: 0.005 · change: +0.002

Affected products

Filebrowser — versions 0, 2.63.22

Weakness classification (CWE)

CWE-639 — Authorization Bypass Through User-Controlled Key

References

github.com/filebrowser/filebrowser/security/advisories/GHSA-77x8-73f4-5485 (vendor-advisory)
github.com/filebrowser/filebrowser/commit/72faf6dd3c85628e332d3e567124b86708ce2… (patch)
www.vulncheck.com/advisories/file-browser-before-authorization-bypass-via-recur… (third-party-advisory)

Frequently asked questions

What is CVE-2026-73612?: CVE-2026-73612 is a high-severity vulnerability in Filebrowser, classified under Authorization Bypass Through User-Controlled Key. CVSS score: 8.1/10. Published 2026-08-13.
How severe is CVE-2026-73612?: High severity. CVSS v3 base score is 8.1 out of 10.