CVE-2026-108638

MEDIUM 4.3

JeecgBoot through 3.9.5 Missing Authorization via /sys/user/deleteGroupUser

CVSS Score

4.3

EPSS Score

0.0%

EPSS Percentile

0th

JeecgBoot through 3.9.5 contains a missing authorization vulnerability that allows low-privileged authenticated users to remove group memberships via the deleteGroupUser handler in SysUserController. Attackers can send DELETE requests with arbitrary groupId and userId values to remove any user from any administrator-maintained user group without ownership or tenant checks.

CWE	CWE-862
Vendor	jeecgboot
Product	jeecgboot
Published	Oct 10, 2026

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CVSS v3 Breakdown

CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:N/I:L/A:N

Attack Vector

Network

Attack Complexity

Low

Privileges Required

Low

User Interaction

None

Scope

Unchanged

Confidentiality

None

Integrity

Low

Availability

None

Affected Versions

jeecgboot / JeecgBoot

0 ≤ 3.9.5

References

NVD ↗ CVE.org ↗ EPSS Data ↗

github.com: https://github.com/AnkesKasty/cve-request-poc/blob/a7b6d1423555812d8efa26c91c5d0683164b31e5/JeecgBoot/poc_user_group_member_removal.py github.com: 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#L829-L844 vulncheck.com: https://www.vulncheck.com/advisories/jeecgboot-through-3.9.5-missing-authorization-via-sys-user-deletegroupuser

Credits

Yaqi Chao