CVE-2026-108891 JeecgBoot through 3.9.5 Missing Authorization via /sys/user/getUserDetailByUserId
Authenticated users can access other users' personal details by manipulating user IDs in the API, exposing sensitive PII.
- 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-2026-108891?
CVE-2026-108891 is a medium-severity missing authorization vulnerability in JeecgBoot, published on 11 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 in the SysUserController getUserDetailByUserId handler that allows any authenticated user to read other users' details. Low-privileged attackers can supply arbitrary userId values to retrieve real names, usernames, emails, phone numbers, birthdays, employee numbers, department paths and posts.
Weakness: CWE-862
Which versions are affected by CVE-2026-108891?
How do I fix CVE-2026-108891?
No fix has been published for CVE-2026-108891 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-2026-108891 being exploited?
It is not confirmed as exploited in the wild, but public exploit code for CVE-2026-108891 exists.
Sources
Also known as GHSA-4gwg-345v-gmc7.