Broken Access Control in yudao-cloud BPM Module

Publication date: 2026-06-30

Last updated on: 2026-06-30

Assigner: VulnCheck

Description

yudao-cloud before 2026.06 contains a broken access control vulnerability in the BPM module that allows any authenticated user to access arbitrary process instance records by supplying a caller-controlled process-instance identifier to an unprotected endpoint lacking the @PreAuthorize annotation. Attackers can query any process-instance identifier through the unguarded GET endpoint to read sensitive workflow data including submitted form variables, approver identities, approval and rejection comments, and process BPMN XML without ownership or tenant party verification.

CVSS Scores

EPSS Scores

Probability:
Percentile:

Meta Information

Published

2026-06-30

Last Modified

2026-06-30

Generated

2026-07-01

AI Q&A

2026-07-01

EPSS Evaluated

N/A

NVD

CVE-2026-58448

Affected Vendors & Products

Vendor	Product	Version / Range
yudao-cloud	bpm	to 2026.06 (exc)

Helpful Resources

Exploitability

CWE

KEV

CWE ID	Description
CWE-862	The product does not perform an authorization check when an actor attempts to access a resource or perform an action.

Attack-Flow Graph

Executive Summary

This vulnerability exists in yudao-cloud before version 2026.06 within the BPM module. It is a broken access control issue that allows any authenticated user to access arbitrary process instance records. This is possible because the GET endpoint handling process-instance identifiers lacks proper authorization checks, specifically missing the @PreAuthorize annotation.

Attackers can supply any process-instance identifier to this unprotected endpoint and retrieve sensitive workflow data without verifying ownership or tenant party. The exposed data includes submitted form variables, approver identities, approval and rejection comments, and the BPMN XML of the process.

Impact Analysis

This vulnerability can lead to unauthorized disclosure of sensitive workflow information. An attacker with valid authentication can access confidential data such as form inputs, identities of approvers, comments related to approvals or rejections, and detailed process definitions.

Such exposure can compromise business process confidentiality, potentially leading to information leakage, privacy violations, and undermining trust in the system's security controls.

Hi! I’m here to help you understand CVE-2026-58448. Ask me anything about the vulnerability, its impact, or mitigation strategies.

0/70