CVE-2026-108638 PUBLISHED

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

Assigner: VulnCheck
Reserved: 10.10.2026 Published: 10.10.2026 Updated: 10.10.2026

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.

CVSS Vector: CVSS:4.0/AV:N/AC:L/AT:N/PR:L/UI:N/VC:N/VI:L/VA:N/SC:N/SI:N/SA:N
CVSS Score: 5.3

Exploitability Metrics		Vulnerable System Impact Metrics		Subsequent System Impact Metrics
Attack Vector	Network	Confidentiality	None	Confidentiality	None
Attack Complexity	Low	Integrity	Low	Integrity	None
Attack Requirements	None	Availability	None	Availability	None
Privileges Required	Low
User Interaction	None

CVSS 4.0

CVSS Vector: CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:N/I:L/A:N
CVSS Score: 4.3

Attack Vector	Network	Scope	Unchanged
Attack Complexity	Low	Confidentiality Impact	None
Privileges Required	Low	Integrity Impact	Low
User Interaction	None	Availability Impact	None

CVSS 3.1

Product Status

Vendor	jeecgboot
Product	JeecgBoot
Versions	Default: unaffected affected from 0 to 3.9.5 (incl.)

CVE-2026-108638 PUBLISHED

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

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Product Status

Credits

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Problem Types