Missing Authorization Vulnerability in JeecgBoot by Jeecg
CVE-2026-108657

8.6HIGH

Key Information:

Vendor

Jeecgboot

Status
Jeecgboot
Vendor
CVE Published:
10 October 2026

Badges

👾 Exploit Exists

What is CVE-2026-108657?

JeecgBoot version 3.9.5 has a significant security vulnerability in the SysTenantController component that leads to missing authorization checks. This flaw allows any authenticated user to approve applications for tenant administrator rights, potentially enabling malicious users to gain escalated privileges. By leveraging the 'doApplyTenantPackUser' functionality and the 'PUT /sys/tenant/passApply' endpoint, attackers can grant themselves unauthorized access to tenant administrative permissions, posing a considerable security risk to affected systems.

Affected Version(s)

JeecgBoot 0 <= 3.9.5

References

https://github.com/AnkesKasty/cve-request-poc/blob/a7b6d1...
exploit
https://github.com/jeecgboot/JeecgBoot/blob/e3b9dc0aefe19...
technical-description
https://www.vulncheck.com/advisories/jeecgboot-through-3....
third-party-advisory

CVSS V4

Score:
8.6
Severity:
HIGH
Confidentiality:
High
Integrity:
High
Availability:
None
Attack Vector:
Network
Attack Complexity:
Low
Attack Required:
None
Privileges Required:
Undefined
User Interaction:
None

Timeline

  • 🟡

    Public PoC available

  • 👾

    Exploit known to exist

  • Vulnerability published

  • Vulnerability Reserved

Credit

Yaqi Chao
.