Vulnerability · Published Oct 10, 2026 · Assigned by VulnCheck

CVE-2026-108637JeecgBoot through 3.9.5 Missing Authorization via deleteUserGroupBatch Endpoint

Medium 4.3

In plain English

A medium-severity missing authorization in JeecgBoot from jeecgboot. Proof-of-concept exploit code is public. The chance it is exploited in the next 30 days is estimated at 0.2% (higher than 15% of all known vulnerabilities).

Severity (CVSS 3.1)4.3Medium

Exploit odds (30 days)0.2%top 85.0% of all CVEs

Exploited in the wildNo reportsCISA SSVC: poc

Attack toolingNoneno public tooling known

Official description

JeecgBoot through 3.9.5 contains a missing authorization vulnerability that allows low-privileged authenticated users to remove user group members by calling DELETE /sys/user/deleteUserGroupBatch. Attackers can supply any groupId and comma-separated userIds to delete sys_ugroup_user rows without permission or tenant checks, tampering with administrator-maintained groups.

Affected products (as reported)

Vendor	Product	Versions
jeecgboot	JeecgBoot	0 – through 3.9.5

Weakness: CWE-862 · Vector: CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:N/I:L/A:N

References

Researcher Proof of Concept exploit
Vulnerable Code (v3.9.5) technical-description
VulnCheck Advisory: JeecgBoot through 3.9.5 Missing Authorization via deleteUserGroupBatch Endpoint third-party-advisory