Improper Authentication in Mall4j Affects Storefront and Admin Users
CVE-2026-102364

5.3MEDIUM

Key Information:

Vendor

Gz-yami

Status
Mall4j
Vendor
CVE Published:
28 September 2026

Badges

👾 Exploit Exists🟡 Public PoC

What is CVE-2026-102364?

The Mall4j product up to version 4.0 contains a vulnerability where the sysType field in sa-token sessions is not properly validated. This oversight permits unauthorized storefront customers to authenticate as back-office users by reusing their existing session tokens. As a result, attackers can register on the public storefront and utilize their customer session tokens to gain access to sensitive admin endpoints that lack proper @PreAuthorize permission checks. These endpoints include critical functionalities such as menu listings, file uploads, and configuration settings, which are typically restricted to authorized admin users only.

Affected Version(s)

mall4j 0 <= 4.0

Exploit Proof of Concept (PoC)

PoC code is written by security researchers to demonstrate the vulnerability can be exploited. PoC code is also a key component for weaponization which could lead to ransomware.

CVE-2026-102364 - Proof of Concept

CVE-2026-102364 - Proof of Concept

References

https://github.com/LinYuanyi1/cve-request-poc/blob/114b3f...
exploit
https://github.com/LinYuanyi1/cve-request-poc/blob/114b3f...
exploit
https://github.com/gz-yami/mall4j
product

CVSS V4

Score:
5.3
Severity:
MEDIUM
Confidentiality:
Low
Integrity:
Low
Availability:
None
Attack Vector:
Network
Attack Complexity:
Low
Attack Required:
None
Privileges Required:
Undefined
User Interaction:
None

Timeline

  • 🟡

    Public PoC available

  • 👾

    Exploit known to exist

  • Vulnerability published

  • Vulnerability Reserved

Credit

Mingsheng Lin
.