Insufficient Session Expiration in mall4j by Yami Technologies
CVE-2026-102367

5.3MEDIUM

Key Information:

Vendor

Gz-yami

Status
Mall4j
Vendor
CVE Published:
28 September 2026

Badges

👾 Exploit Exists🟡 Public PoC

What is CVE-2026-102367?

The mall4j product by Yami Technologies has a vulnerability in its token refresh mechanism that allows disabled user accounts to renew their sessions indefinitely. This occurs because the system fails to validate the enabled flag during the session renewal process at the POST /token/refresh endpoint. As a result, deactivated accounts can maintain unauthorized access that user account disables were intended to prevent. Developers and administrators should take immediate action to address this vulnerability to safeguard user data and maintain system integrity.

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-2026-102367 - Proof of Concept

References

https://github.com/LinYuanyi1/cve-request-poc/blob/114b3f...
exploit
https://github.com/gz-yami/mall4j
product
https://github.com/gz-yami/mall4j/blob/ffc672fc1aa4320ce0...
technical-description

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
.