Auth bypass in Yunaiv Yudao-Cloud
CVE-2026-58448
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.
Vulnerability class: Broken Access Control
Published · last modified .
CVSS v3 metric
CVSS v3 base score 6.5 (Medium). Vector: CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:N/A:N.
EPSS exploit prediction
EPSS: 0.004 (31.8th percentile), scored .
Very low probability of exploitation in the next 30 days; routine patching cadence is appropriate. 32nd percentile — 31.8% of CVEs in the catalogue have a lower EPSS than this one. How to read EPSS.
EPSS over last 30 days · oldest: 0.004 · newest: 0.004 · change: 0.000
Affected products
- Yunaiv Yudao-Cloud — versions 0
Weakness classification (CWE)
References
- github.com/YunaiV/yudao-cloud/releases (release-notes, patch)
- github.com/YunaiV/yudao-cloud/issues/315 (technical-description, exploit)
- www.vulncheck.com/advisories/yudao-cloud-bpm-module-broken-access-control-via-p… (third-party-advisory)
Frequently asked questions
- What is CVE-2026-58448?
- CVE-2026-58448 is a medium-severity vulnerability in Yunaiv Yudao-Cloud, classified under Missing Authorization. CVSS score: 6.5/10. Published 2026-06-30.
- How severe is CVE-2026-58448?
- Medium severity. CVSS v3 base score is 6.5 out of 10.