What is CVE-2026-108638?

CVE-2026-108638 is a medium-severity vulnerability in Jeecgboot, classified under Missing Authorization. CVSS score: 4.3/10. Published 2026-10-10.

How severe is CVE-2026-108638?

Medium severity. CVSS v3 base score is 4.3 out of 10.

Auth bypass in Jeecgboot

CVE-2026-108638

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.

Vulnerability class: Broken Access Control

Published 2026-10-10.

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:N/I:L/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

Jeecgboot

Weakness classification (CWE)

CWE-862 — Missing Authorization

References

github.com/AnkesKasty/cve-request-poc/blob/a7b6d1423555812d8efa26c91c5d0683164b… (exploit)
github.com/jeecgboot/JeecgBoot/blob/e3b9dc0aefe1943d9772b026f64ed671a7c82802/je… (technical-description)
www.vulncheck.com/advisories/jeecgboot-through-3.9.5-missing-authorization-via-… (third-party-advisory)

Frequently asked questions

What is CVE-2026-108638?: CVE-2026-108638 is a medium-severity vulnerability in Jeecgboot, classified under Missing Authorization. CVSS score: 4.3/10. Published 2026-10-10.
How severe is CVE-2026-108638?: Medium severity. CVSS v3 base score is 4.3 out of 10.