# CVE-2026-102365: mall4j authorization bypass in UserAddrController endpoints

Source: https://junglewise.ai/threats/cve-2026-102365-mall4j-through-4-0-fails-to-enforce-authorization-checks-on-get  
Publisher: Junglewise Threat Intelligence, https://junglewise.ai/threats  
Published: 2026-09-29. Updated: 2026-09-29  
License: CC BY 4.0 with a link back

CVE-2026-102365 · Severity: medium · CVSS 6.5 · Published 2026-09-29

mall4j is an open-source e-commerce platform providing online shopping functionality. Attackers with valid login credentials can bypass authorization controls to retrieve sensitive customer data including names, phone numbers, and delivery addresses through unauthenticated access to address endpoints. This enables large-scale harvesting of personal information that could be sold or used for targeted fraud.

Technologies: [Gz-Yami Mall4j](https://junglewise.ai/threats/technologies/mall4j). Vendors: [Gz-Yami](https://junglewise.ai/threats/vendors/gz-yami).

## Quick answers

**Is CVE-2026-102365 exploited in the wild?** No. Junglewise Threat Intelligence has no report of CVE-2026-102365 being exploited in the wild.

**How severe is CVE-2026-102365?** Medium severity, with a CVSS score of 6.5, published 29 September 2026.

**Which products and versions are affected?** Gz-Yami Mall4j through 4.0.

**Is there a fix for CVE-2026-102365?** No fixed version is recorded yet. Check the vendor's advisory in the references below. If you run it, Junglewise drafts a mitigation that fits your setup and applies it once you approve, with senior security engineers behind it.

**How is CVE-2026-102365 attacked?** It is attacked over the network, in a software library.

**Am I affected by CVE-2026-102365?** Check whether you run Gz-Yami Mall4j at an affected version. Junglewise does that check for you around the clock: connect your code, cloud and domains, and it matches new vulnerabilities like this one against what you actually run and tells you when one reaches you.

## Technical details

The vulnerability is an authorization bypass (BFLA - Broken Function Level Authorization) in GET endpoints /user/addr/page and /user/addr/info within UserAddrController. Authenticated attackers can call these endpoints to retrieve any customer's address records without proper ownership validation. The issue affects mall4j through version 4.0 and requires attacker authentication but no special privileges.

## Affected products

- gz-yami mall4j through 4.0

## Timeline

- 2026-09-29: disclosed

## References

- [https://github.com/gz-yami/mall4j](https://github.com/gz-yami/mall4j)
- [https://github.com/LinYuanyi1/cve-request-poc/blob/114b3f0d149e50a7678f591bf8043399fc9ac96c/mall4j/A02_admin_useraddr_bfla.py](https://github.com/LinYuanyi1/cve-request-poc/blob/114b3f0d149e50a7678f591bf8043399fc9ac96c/mall4j/A02_admin_useraddr_bfla.py)

## Related threats

- [mall4j improper authorization in cart deletion](https://junglewise.ai/threats/cve-2026-108691-mall4j-through-4-0-contains-an-improper-authorization)
- [mall4j information disclosure via cart endpoint SQL injection](https://junglewise.ai/threats/cve-2026-108690-mall4j-through-4-0-contains-an-information-disclosure)
- [mall4j insufficient session expiration in token refresh](https://junglewise.ai/threats/cve-2026-102367-mall4j-through-4-0-contains-an-insufficient-session-expiration)
- [mall4j session privilege escalation via sysType field](https://junglewise.ai/threats/cve-2026-102364-mall4j-through-4-0-fails-to-validate-the-systype-field-in-sa)
- [mall4j product review deletion auth bypass in ProdCommController](https://junglewise.ai/threats/cve-2026-102362-mall4j-through-4-0-fails-to-implement-authentication-controls-on)