---
id: CVE-2026-102364
title: >-
  mall4j through 4.0 fails to validate the sysType field in sa-token sessions,
  allowing storefront customers to authenticate as back-office users by reusing
  their session tokens
summary: >-
  mall4j through 4.0 fails to validate the sysType field in sa-token sessions,
  allowing storefront customers to authenticate as back-office users by reusing
  their session tokens. Attackers can register on the public storefront and use
  thei…
severity: medium
cvss: 5.4
cvssVector: 'CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:L/I:L/A:N'
cwe:
  - CWE-287
vendor: gz-yami
product: mall4j
affected:
  - mall4j <= 4.0
published: '2026-09-29'
updated: '2026-09-29'
sourceUpdated: '2026-09-29T00:17:03.633'
source: NVD
sourceUrl: 'https://nvd.nist.gov/vuln/detail/CVE-2026-102364'
references:
  - url: >-
      https://github.com/LinYuanyi1/cve-request-poc/blob/114b3f0d149e50a7678f591bf8043399fc9ac96c/mall4j/A05_sys_menu_missing_perm.py
    label: disclosure@vulncheck.com
  - url: >-
      https://github.com/LinYuanyi1/cve-request-poc/blob/114b3f0d149e50a7678f591bf8043399fc9ac96c/mall4j/A09_admin_read_endpoints_bfla.py
    label: disclosure@vulncheck.com
  - url: 'https://github.com/gz-yami/mall4j'
    label: disclosure@vulncheck.com
  - url: >-
      https://github.com/gz-yami/mall4j/blob/ffc672fc1aa4320ce02d0b93853bb456ae0a4dae/yami-shop-security/yami-shop-security-common/src/main/java/com/yami/shop/security/common/filter/AuthFilter.java#L60-L119
    label: disclosure@vulncheck.com
  - url: >-
      https://www.vulncheck.com/advisories/mall4j-through-4.0-improper-authentication-accepts-storefront-tokens-on-admin-api
    label: disclosure@vulncheck.com
tags:
  - nvd
  - cve.org
ingestedAt: '2026-09-29T00:24:04.804Z'
---

## Overview

mall4j through 4.0 fails to validate the sysType field in sa-token sessions, allowing storefront customers to authenticate as back-office users by reusing their session tokens. Attackers can register on the public storefront and use their customer session token to access admin endpoints lacking @PreAuthorize permission checks, including menu listings, file uploads, and configuration endpoints.

## Remediation

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