Medium severity · published Sep 28, 2026
CVE-2026-102364
mall4j through 4.0 Improper Authentication Accepts Storefront Tokens on Admin API
5.4
CVSS
0.2%
EPSS
No
On KEV
Description
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.
CVSS vector
CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:L/I:L/A:N
Attack vector
Network
Complexity
Low
Privileges
Low
User interaction
None
Confidentiality
Low
Integrity
Low
Availability
None
Scope
Unchanged
Exploitation
Is it being used?
Exploit prediction (EPSS)0.2% · higher than 7% of CVEs
Exploited in the wildNo evidence yet
CISA KEVNot listed
Ransomware campaign useNot known
Affected products
Which versions
MA
mall4j · gz-yami
through 4.0 · source: vendor
References
NVD
https://nvd.nist.gov/vuln/detail/CVE-2026-102364
CVE.org
https://www.cve.org/CVERecord?id=CVE-2026-102364
exploit
https://github.com/LinYuanyi1/cve-request-poc/blob/114b3f0d149e50a7678f591bf8043399fc9ac96c/mall4j/A05_sys_menu_missing_perm.py
exploit
https://github.com/LinYuanyi1/cve-request-poc/blob/114b3f0d149e50a7678f591bf8043399fc9ac96c/mall4j/A09_admin_read_endpoints_bfla.py
product
https://github.com/gz-yami/mall4j
technical-description
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
third-party-advisory
https://www.vulncheck.com/advisories/mall4j-through-4.0-improper-authentication-accepts-storefront-tokens-on-admin-api
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