Auth bypass in Zfile-Dev Zfile
CVE-2026-91144
ZFile through 5.0.5 fails to validate requested file paths against a share link's allowed entries on the download endpoint. Attackers holding a share link can supply arbitrary file paths as query parameters to download any file under the shared base directory, bypassing the intended access restrictions.
Vulnerability class: IDOR (Insecure Direct Object Reference)
Published · last modified .
CVSS v3 metric
CVSS v3 base score 7.5 (High). Vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:N/A:N.
EPSS exploit prediction
EPSS: 0.005 (43.1th percentile), scored .
Very low probability of exploitation in the next 30 days; routine patching cadence is appropriate. 43rd percentile — 43.1% 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/zfile-dev/zfile/issues/826 (issue-tracking)
- github.com/zfile-dev/zfile (product)
- github.com/zfile-dev/zfile/blob/5.0.5/src/main/java/im/zhaojun/zfile/module/sha… (technical-description)
- www.vulncheck.com/advisories/zfile-through-5.0.5-share-entry-filter-bypass-via-… (third-party-advisory)
Frequently asked questions
- What is CVE-2026-91144?
- CVE-2026-91144 is a high-severity vulnerability in Zfile-Dev Zfile, classified under Authorization Bypass Through User-Controlled Key. CVSS score: 7.5/10. Published 2026-09-14.
- How severe is CVE-2026-91144?
- High severity. CVSS v3 base score is 7.5 out of 10.