---
title: "CVE-2026-91144: ZFile - Broken Access Control"
description: "ZFile <= 5.0.5 contains a broken access control caused by insufficient validation of file paths on the download endpoint, letting attackers with a share link download arbitrary files under the shared base directory, exploit requires attacker to have a valid share link."
url: https://panop.io/threat-heartbeat/CVE-2026-91144/
---

# CVE-2026-91144 ZFile - Broken Access Control

ZFile <= 5.0.5 contains a broken access control caused by insufficient validation of file paths on the download endpoint, letting attackers with a share link download arbitrary files under the shared base directory, exploit requires attacker to have a valid share link.

CVSS base score 7.5 /10

High

CISA KEV

Not listed

Public exploit

None known

Authentication

Not required

EPSS

0.51% chance of exploitation in 30 days

[View the NVD record ↗](https://nvd.nist.gov/vuln/detail/CVE-2026-91144)

## Details

Type

Broken Access Control

Impact

Information Disclosure, File System Read

CVSS vector

CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:N/A:N

Published

14 September 2026

Updated

15 October 2026

Weakness

[CWE-639](https://cwe.mitre.org/data/definitions/639.html)

## Vendor fix

Update to the latest version beyond 5.0.5.

Patching closes this CVE. It does not tell you which of your systems run the affected version, or what else is exposed alongside them.

## References

- [https://nvd.nist.gov/vuln/detail/CVE-2026-91144](https://nvd.nist.gov/vuln/detail/CVE-2026-91144)
- [https://github.com/zfile-dev/zfile](https://github.com/zfile-dev/zfile)
- [https://github.com/zfile-dev/zfile/blob/5.0.5/src/main/java/im/zhaojun/zfile/module/share/service/ShareLinkFileService.java](https://github.com/zfile-dev/zfile/blob/5.0.5/src/main/java/im/zhaojun/zfile/module/share/service/ShareLinkFileService.java)
- [https://github.com/zfile-dev/zfile/issues/826](https://github.com/zfile-dev/zfile/issues/826)
- [https://www.vulncheck.com/advisories/zfile-through-5.0.5-share-entry-filter-bypass-via-download-endpoint](https://www.vulncheck.com/advisories/zfile-through-5.0.5-share-entry-filter-bypass-via-download-endpoint)

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## What this record can't tell you

- Whether you run the affected software, and where
- Whether an attacker can actually reach and exploit it
- The misconfigurations that never get a CVE number
- What it would cost the business, ranked into what to fix first

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