Authorization Bypass Vulnerability in Tencent WeKnora Config API Endpoint
CVE-2026-8786

5.3MEDIUM

Key Information:

Vendor

Tencent

Status
Weknora
Vendor
CVE Published:
18 May 2026

Badges

👾 Exploit Exists🟡 Public PoC

What is CVE-2026-8786?

A vulnerability exists in the Tencent WeKnora Config API Endpoint, specifically in the getKnowledgeBaseForInitialization function within initialization.go. This issue allows unauthorized access due to improper validation of the kbId argument. The vulnerability can be exploited remotely, risking exposure of sensitive information. Public disclosure of the exploit may increase its potential use, and efforts to communicate with the vendor regarding the issue have not been met with a response.

Affected Version(s)

WeKnora 0.3.0

WeKnora 0.3.1

WeKnora 0.3.2

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-2026-8786 - Proof of Concept

References

https://vuldb.com/vuln/364410
vdb-entrytechnical-description
https://vuldb.com/vuln/364410/cti
signaturepermissions-required
https://vuldb.com/submit/812172
third-party-advisory

CVSS V4

Score:
5.3
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

Eric-z (VulDB User)
VulDB CNA Team
.