Improper Authentication Vulnerability in YunaiV yudao-cloud
CVE-2026-7679

6.9MEDIUM

Key Information:

Vendor

Yunaiv

Status
Yudao-cloud
Vendor
CVE Published:
3 May 2026

Badges

👾 Exploit Exists🟡 Public PoC

What is CVE-2026-7679?

A security flaw has been discovered in YunaiV's yudao-cloud that affects the getAccessToken function within the OAuth2TokenServiceImpl.java located at yudao-module-system-biz/src/main/java/io/github/ruoyi/common/oauth2/service/impl. This vulnerability allows for improper authentication, which can be exploited remotely. An attack can be initiated by manipulating the function, leading to unauthorized access. Publicly available exploit code raises concerns regarding the risk it poses, especially since the vendor has not responded to previous disclosures regarding this issue.

Affected Version(s)

yudao-cloud 2026.01

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-2026-7679 - Proof of Concept

References

https://vuldb.com/vuln/360832
vdb-entrytechnical-description
https://vuldb.com/vuln/360832/cti
signaturepermissions-required
https://vuldb.com/submit/800866
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

9str0il (VulDB User)
VulDB CNA Team
.