---
id: CVE-2026-108637
title: >-
  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
summary: >-
  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 com…
severity: medium
cvss: 4.3
cvssVector: 'CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:N/I:L/A:N'
cwe:
  - CWE-862
published: '2026-10-10'
updated: '2026-10-13'
sourceUpdated: '2026-10-13T20:42:49.903'
source: NVD
sourceUrl: 'https://nvd.nist.gov/vuln/detail/CVE-2026-108637'
references:
  - url: >-
      https://github.com/AnkesKasty/cve-request-poc/blob/a7b6d1423555812d8efa26c91c5d0683164b31e5/JeecgBoot/poc_user_group_member_removal_batch.py
    label: disclosure@vulncheck.com
  - url: >-
      https://github.com/jeecgboot/JeecgBoot/blob/e3b9dc0aefe1943d9772b026f64ed671a7c82802/jeecg-boot/jeecg-module-system/jeecg-system-biz/src/main/java/org/jeecg/modules/system/controller/SysUserController.java#L851-L866
    label: disclosure@vulncheck.com
  - url: >-
      https://www.vulncheck.com/advisories/jeecgboot-through-3.9.5-missing-authorization-via-deleteusergroupbatch-endpoint
    label: disclosure@vulncheck.com
tags:
  - nvd
  - cve.org
  - exploit-available
epss: 0.00238
epssPercentile: 0.1481
ingestedAt: '2026-10-10T22:34:13.260Z'
vendor: jeecgboot
product: JeecgBoot
affected:
  - JeecgBoot <= 3.9.5
exploitAvailable: true
ssvc:
  exploitation: poc
  automatable: 'no'
  technicalImpact: partial
  timestamp: '2026-10-18T11:42:59.622821Z'
---

## Overview

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.

## Remediation

Refer to the linked advisories for vendor-supplied fixes and affected version ranges.