Vulnerability · Published Oct 13, 2026 · Assigned by VulnCheck
CVE-2026-110118WorkFlow-Engine through 9.6.11 Missing Authorization via flowableui buttonOperation Endpoints
Medium 6.5
In plain English
A medium-severity authorization bypass via user-controlled key in WorkFlow-Engine from risesoft-y9. There are no confirmed reports of exploitation so far. The chance it is exploited in the next 30 days is estimated at 0.3% (higher than 20% of all known vulnerabilities).
Official description
WorkFlow-Engine through 9.6.11 contains a missing authorization vulnerability that allows authenticated users to complete or reassign other users' workflow tasks via /vue/buttonOperation endpoints. Low-privileged attackers can supply a known taskId to the complete, completeTask or reAssign handlers to approve tasks or reassign them without authority.
Affected products (as reported)
| Vendor | Product | Versions |
|---|---|---|
| risesoft-y9 | WorkFlow-Engine | 0 – through 9.6.11 |
Weakness: CWE-639 · Vector: CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:N/I:H/A:N
References
- https://hackmd.io/@1ExmmukzRMWN7B4gQ4W-4Q/workflow-engine-task-op-missing-authz third-party-advisory
- https://github.com/risesoft-y9/WorkFlow-Engine/blob/v9.6.11/y9-module-flowableui/risenet-y9boot-support-flowableui/src/main/java/net/risesoft/controller/buttonOperation/ButtonOperationRestController.java#L1035-L1054 technical-description
- https://github.com/risesoft-y9/WorkFlow-Engine/blob/v9.6.11/y9-module-flowableui/risenet-y9boot-support-flowableui/src/main/java/net/risesoft/controller/buttonOperation/ButtonOperationRestController.java#L216-L252 technical-description
- https://github.com/risesoft-y9/WorkFlow-Engine/blob/v9.6.11/y9-module-processadmin/risenet-y9boot-support-processadmin/src/main/java/net/risesoft/service/impl/CustomTaskServiceImpl.java#L76-L79 technical-description
- VulnCheck Advisory: WorkFlow-Engine through 9.6.11 Missing Authorization via flowableui buttonOperation Endpoints third-party-advisory