---
id: CVE-2026-92919
title: >-
  admin3 through 3.0.0 fails to sanitize client-supplied filenames in the upload
  handler, allowing authenticated users to write files outside the storage root
  on Windows deployments
summary: >-
  admin3 through 3.0.0 fails to sanitize client-supplied filenames in the upload
  handler, allowing authenticated users to write files outside the storage root
  on Windows deployments. Attackers can use dot-dot path segments in filenames
  to …
severity: high
cvss: 8.1
cvssVector: 'CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:N/I:H/A:H'
cwe:
  - CWE-22
vendor: cjbi
product: admin3
affected:
  - admin3 <= 3.0.0
published: '2026-09-17'
updated: '2026-09-22'
sourceUpdated: '2026-09-22T20:53:07.383'
source: NVD
sourceUrl: 'https://nvd.nist.gov/vuln/detail/CVE-2026-92919'
references:
  - url: >-
      https://github.com/LinYuanyi1/cve-request-poc/blob/master/admin3/C03_storage_path_traversal_write.py
    label: disclosure@vulncheck.com
  - url: 'https://github.com/cjbi/admin3'
    label: disclosure@vulncheck.com
  - url: >-
      https://github.com/cjbi/admin3/blob/3.0.0/admin3-server/src/main/java/tech/wetech/admin3/infra/storage/LocalStorage.java
    label: disclosure@vulncheck.com
  - url: >-
      https://github.com/cjbi/admin3/blob/3.0.0/admin3-server/src/main/java/tech/wetech/admin3/infra/storage/StorageServiceImpl.java
    label: disclosure@vulncheck.com
  - url: >-
      https://www.vulncheck.com/advisories/admin3-through-3.0.0-arbitrary-file-write-via-path-traversal-in-storage-upload-filename
    label: disclosure@vulncheck.com
tags:
  - nvd
  - cve.org
  - exploit-available
epss: 0.00584
epssPercentile: 0.45552
exploitAvailable: true
ssvc:
  exploitation: poc
  automatable: 'no'
  technicalImpact: partial
  timestamp: '2026-09-17T18:41:55.304263Z'
ingestedAt: '2026-09-17T13:18:16.980Z'
---

## Overview

admin3 through 3.0.0 fails to sanitize client-supplied filenames in the upload handler, allowing authenticated users to write files outside the storage root on Windows deployments. Attackers can use dot-dot path segments in filenames to escape the configured storage directory and overwrite arbitrary files accessible to the server process.

## Remediation

Refer to the linked advisories for vendor-supplied fixes and affected version ranges.