Missing Authorization Flaw in JeecgBoot Affects User Data Privacy
CVE-2026-108891

5.3MEDIUM

Key Information:

Vendor

Jeecgboot

Status
Jeecgboot
Vendor
CVE Published:
11 October 2026

Badges

👾 Exploit Exists🟡 Public PoC

What is CVE-2026-108891?

JeecgBoot versions up to 3.9.5 contain a significant missing authorization flaw in the SysUserController's getUserDetailByUserId method. This vulnerability permits any authenticated user to access and retrieve sensitive information, including real names, usernames, email addresses, phone numbers, birthdays, employee identification numbers, department affiliations, and posts of other users. By exploiting this vulnerability, low-privileged attackers can manipulate arbitrary user ID inputs to expose private user data, posing a serious risk to user privacy and system integrity.

Affected Version(s)

JeecgBoot 0 <= 3.9.5

Exploit Proof of Concept (PoC)

PoC code is written by security researchers to demonstrate the vulnerability can be exploited. PoC code is also a key component for weaponization which could lead to ransomware.

CVE-2026-108891 - Proof of Concept

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:
5.3
Severity:
MEDIUM
Confidentiality:
Low
Integrity:
None
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
.