JeecgBoot up to 3.9.5 User Group Member Removal deleteUserGroupBatch groupId/userIds improper authorization

Summaryinfo

A vulnerability classified as problematic has been found in JeecgBoot up to 3.9.5. This affects an unknown part of the file /sys/user/deleteUserGroupBatch of the component User Group Member Removal. The manipulation of the argument groupId/userIds leads to improper authorization. This vulnerability is traded as CVE-2026-108637. It is possible to initiate the attack remotely. There is no exploit available.

Detailsinfo

A vulnerability was found in JeecgBoot up to 3.9.5. It has been rated as problematic. This issue affects some unknown processing of the file /sys/user/deleteUserGroupBatch of the component User Group Member Removal. The manipulation of the argument groupId/userIds with an unknown input leads to a improper authorization vulnerability. Using CWE to declare the problem leads to CWE-285. The product does not perform or incorrectly performs an authorization check when an actor attempts to access a resource or perform an action. Impacted is integrity. The summary by CVE is:

JeecgBoot through 3.9.5 contains a missing authorization vulnerability that allows low-privileged authenticated users to remove user group members by calling DELETE /sys/user/deleteUserGroupBatch. Attackers can supply any groupId and comma-separated userIds to delete sys_ugroup_user rows without permission or tenant checks, tampering with administrator-maintained groups.

The advisory is shared at github.com. The identification of this vulnerability is CVE-2026-108637 since 10/10/2026. The exploitation is known to be easy. The attack may be initiated remotely. Technical details are known, but no exploit is available. The price for an exploit might be around USD $0-$5k at the moment (estimation calculated on 10/11/2026). MITRE ATT&CK project uses the attack technique T1548.002 for this issue.

There is no information about possible countermeasures known. It may be suggested to replace the affected object with an alternative product.

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Productinfo

Name

• JeecgBoot

Version

• 3.9.0
• 3.9.1
• 3.9.2
• 3.9.3
• 3.9.4
• 3.9.5

CPE 2.3info

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CPE 2.2info

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