CVE-2026-108646 [MEDIUM] – JeecgBoot through 3.9.5 contains a missing authorization vulnerability in the SysCategoryC

JeecgBoot through 3.9.5 contains a missing authorization vulnerability in the SysCategoryController importExcel handler that allows any authenticated user to import category dictionary entries. Low-privileged attackers can upload crafted Excel workbooks to bulk insert arbitrary nodes into the system-wide sys_category dictionary, including under existing parent nodes.