Critical severity · published Sep 28, 2026
CVE-2026-102361
mall4j through 4.0 Missing Authentication in Password Update Endpoint
9.1
CVSS
0.4%
EPSS
No
On KEV
Description
mall4j through 4.0 contains a missing authentication vulnerability in the PUT /user/updatePwd endpoint that allows unauthenticated attackers to reset any storefront account password. Attackers can supply a target username in the request body to overwrite passwords without verification, enabling account takeover and access to orders and personal data.
CVSS vector
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:N
Attack vector
Network
Complexity
Low
Privileges
None
User interaction
None
Confidentiality
High
Integrity
High
Availability
None
Scope
Unchanged
Exploitation
Is it being used?
Exploit prediction (EPSS)0.4% · higher than 30% 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-2026-102361
CVE.org
https://www.cve.org/CVERecord?id=CVE-2026-102361
exploit
https://github.com/LinYuanyi1/cve-request-poc/blob/114b3f0d149e50a7678f591bf8043399fc9ac96c/mall4j/A01_updatepwd_account_takeover.py
product
https://github.com/gz-yami/mall4j
technical-description
https://github.com/gz-yami/mall4j/blob/ffc672fc1aa4320ce02d0b93853bb456ae0a4dae/yami-shop-api/src/main/java/com/yami/shop/api/controller/UserRegisterController.java#L78-L100
third-party-advisory
https://www.vulncheck.com/advisories/mall4j-through-4.0-missing-authentication-in-password-update-endpoint
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