Missing Authentication Vulnerability in yezhihao jt808-server Web Management API
CVE-2026-121926

6.9MEDIUM

Key Information:

Vendor

Yezhihao

Status
Jt808-server
Vendor
CVE Published:
4 November 2026

Badges

👾 Exploit Exists🟡 Public PoC

What is CVE-2026-121926?

A vulnerability in the yezhihao jt808-server's Web Management API allows for potential exploitation due to missing authentication in the function WebMvcConfig.addInterceptors. This design flaw means that attackers can remotely manipulate the system without proper authentication, leading to unauthorized access. The vulnerability affects all versions of the product up to the specified commit, with the vendor alerting users that there has been no response to previous disclosures regarding this issue. Given the nature of a rolling release system, ongoing vigilance is recommended to mitigate potential risks associated with this vulnerability.

Affected Version(s)

jt808-server a07f68c466b560b97ef41edb8a4966469abdf83e

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-2026-121926 - Proof of Concept

References

https://vuldb.com/vuln/431035
vdb-entrytechnical-description
https://vuldb.com/vuln/431035/cti
signaturepermissions-required
https://vuldb.com/cve/CVE-2026-121926
third-party-advisory

CVSS V4

Score:
6.9
Severity:
MEDIUM
Confidentiality:
Low
Integrity:
Low
Availability:
Low
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

jance (VulDB User)
VulDB CNA Team
.