Broken Access Control in Yudao Cloud BPM Module
CVE-2026-58448

7.1HIGH

Key Information:

Vendor

Yunaiv

Status
Yudao-cloud
Vendor
CVE Published:
30 June 2026

Badges

👾 Exploit Exists🟡 Public PoC

What is CVE-2026-58448?

The Yudao Cloud BPM module prior to version 2026.06 is susceptible to a broken access control vulnerability. This flaw enables any authenticated user to manipulate a caller-controlled process-instance identifier to access unprotected endpoints. Consequently, attackers can exploit this vulnerability to retrieve sensitive data including submitted form variables, approver identities, and other workflow-related information without any verification of ownership or associated tenant security protocols. This presents a significant risk of exposing confidential workflow data through an improperly secured GET endpoint.

Affected Version(s)

yudao-cloud 0 < 2026.06

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-2026-58448 - Proof of Concept

References

https://github.com/YunaiV/yudao-cloud/releases#release-v2...
release-notespatch
https://github.com/YunaiV/yudao-cloud/issues/315
technical-descriptionexploit
https://www.vulncheck.com/advisories/yudao-cloud-bpm-modu...
third-party-advisory

CVSS V4

Score:
7.1
Severity:
HIGH
Confidentiality:
High
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

George Chen
.