Improperly Controlled Modification of Dynamically-Determined Object Attributes in Flowise - CVE-2026-42863
Published: May 18, 2026
Vulnerability identifier: #VU131707
CSH Severity: Low
CVSS v4.0: CVSS:4.0/AV:N/AC:L/AT:P/PR:L/UI:N/VC:H/VI:H/VA:N/SC:N/SI:N/SA:N/E:U/U:Clear
CVE-ID: CVE-2026-42863
CWE-ID: CWE-915
Exploitation vector: Remote access
Exploit availability:
No public exploit available
Vendor: FlowiseAI
Affected software:
Flowise
Flowise
Detailed vulnerability description
The vulnerability allows a remote user to modify chatflow attributes across workspaces.
The vulnerability exists due to improperly controlled modification of dynamically-determined object attributes in the chatflow update endpoint when handling crafted PUT requests to /api/v1/chatflows/{chatflowId}. A remote user can send a crafted JSON request body with server-controlled fields to modify chatflow attributes across workspaces.
In multi-tenant environments, exploitation can break tenant isolation boundaries by reassigning a chatflow to another workspace and changing its visibility or deployment state.
How to mitigate CVE-2026-42863
Install security update from vendor's website.