Missing Authorization Vulnerability in JeecgBoot Affects User Permissions
CVE-2026-108866

5.3MEDIUM

Key Information:

Vendor

Jeecgboot

Status
Jeecgboot
Vendor
CVE Published:
11 October 2026

Badges

👾 Exploit Exists🟡 Public PoC

What is CVE-2026-108866?

JeecgBoot versions up to 3.9.5 are susceptible to a missing authorization vulnerability that permits authenticated users to access another user's permissions. By exploiting this flaw, low-privileged attackers can manipulate the 'userId' parameter in the queryUserAuths handler, enabling them to extract sensitive information regarding user permissions and potentially identify administrator accounts. This raises significant security concerns, as it could facilitate unauthorized access or elevation of privileges within the application.

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-2026-108866 - 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
.