CVE-2026-108638 JeecgBoot through 3.9.5 Missing Authorization via /sys/user/deleteGroupUser
Low-privileged users can remove any user from any group in JeecgBoot due to missing authorization checks in the deleteGroupUser endpoint.
- Exploited in the wild
- Not known
- Login needed
- Any signed-in user
- Attackable
- Over the internet
- Victim action needed
- Not needed
- Fix
- None listed
What is CVE-2026-108638?
CVE-2026-108638 is a medium-severity missing authorization vulnerability in JeecgBoot, published on 10 Oct 2026. Any signed-in user can exploit it over the network, with no action from the victim.
Official description
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.
Weakness: CWE-862
Which versions are affected by CVE-2026-108638?
How do I fix CVE-2026-108638?
No fix has been published for CVE-2026-108638 yet. Limit exposure of the affected software until one is available.
Upgrade, and check permissions on every request on the server, not only in the interface. More about Missing authorization.
Is CVE-2026-108638 being exploited?
It is not confirmed as exploited in the wild, but public exploit code for CVE-2026-108638 exists.
Sources
Also known as GHSA-mjcw-r5vv-4wqh.