Auth bypass in Jeecgboot

CVE-2026-108891

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.

Vulnerability class: Broken Access Control

Published .

CVSS v3 metric

CVSS v3 base score 4.3 (Medium). Vector: CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:L/I:N/A:N.

EPSS exploit prediction

No EPSS score from FIRST.org yet. New CVEs usually get one within a few days; no score means no signal yet, not low risk. How EPSS works.

Affected products

Weakness classification (CWE)

References

Frequently asked questions

What is CVE-2026-108891?
CVE-2026-108891 is a medium-severity vulnerability in Jeecgboot, classified under Missing Authorization. CVSS score: 4.3/10. Published 2026-10-11.
How severe is CVE-2026-108891?
Medium severity. CVSS v3 base score is 4.3 out of 10.