Reference page — cumulative record through Monday, October 19, 2026 UTC. Reference pages update as the archive grows; only dated daily editions are immutable pages of record.

CVE-2026-108638

CVE-2026-108638MEDIUM

JeecgBoot through 3.9.5 Missing Authorization via /sys/user/deleteGroupUser

  AV  AC  AT  PR  UI  VC  VI  VA   CVSS    EPSS   %ile   KEV
   N   L   N   L   N   N   L   N    5.3   .0024   13.8     —

AFFECTED
  Product    Versions     Fixed
  JeecgBoot  unspecified  —

TIMELINE
  Oct 10  Reserved by VulnCheck
  Oct 10  Published (CNA: VulnCheck)
  Oct 13  EXPLOIT PUBLISHED — CVE-2026-108638 (JeecgBoot). Public exploit reference added.
  Oct 14  EXPLOIT PUBLISHED — CVE-2026-108638 (JeecgBoot). Public exploit reference added.

CWE-862 · CNA: VulnCheck · CVSS v4.0 · 3 references · NVD status: Deferred

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.

Lifecycle

Complete event history — 4 events, chronological
Date	Event	Detail
October 10, 2026	Reserved	Reserved by VulnCheck
October 10, 2026	Published	Published (CNA: VulnCheck)
October 13, 2026	EXPLOIT PUBLISHED	EXPLOIT PUBLISHED — CVE-2026-108638 (JeecgBoot). Public exploit reference added.
October 14, 2026	EXPLOIT PUBLISHED	EXPLOIT PUBLISHED — CVE-2026-108638 (JeecgBoot). Public exploit reference added.

Affected

Affected products and packages — 1 row
Vendor	Product / Package	Ecosystem	Version introduced	Fixed
jeecgboot	JeecgBoot	—	—	—

Weaknesses

CWE-862

References (3)

Authoritative record: CVE-2026-108638 at cve.org

Vendors: jeecgboot

Weaknesses: CWE-862

About this page

This is a reference page, not a dated page of record. It assembles the complete lifecycle of CVE-2026-108638 from the CVE Program record, NVD enrichment, the CISA KEV catalog, EPSS, and OSV advisories. The box score's numbers (CVSS, EPSS, KEV status) are current as of Monday, October 19, 2026 UTC and are re-derived as the archive grows; only dated daily editions are immutable pages of record. The authoritative source for this identifier is cve.org.