Authorization bypass through user-controlled key in Flowise - CVE-2026-91930
Published: September 1, 2026 / Updated: September 16, 2026
Vulnerability identifier: #VU146546
CSH Severity: Medium
CVSS v4: 8.7 [CVSS:4.0/AV:N/AC:L/AT:N/PR:L/UI:N/VC:H/VI:H/VA:H/SC:N/SI:N/SA:N]
CVE-ID: CVE-2026-91930
CWE-ID: CWE-639
Exploitation vector: Remote access
Exploit availability:
No public exploit available
Vulnerability details
The vulnerability allows a remote user to gain administrative access to another organization's workspaces and resources.
The vulnerability exists due to authorization bypass through user-controlled key in organization and workspace membership APIs when processing attacker-supplied organization and workspace identifiers. A remote user can send crafted API requests with another organization's IDs to gain administrative access to another organization's workspaces and resources.
Exploitation requires a valid authenticated session with management permissions in the attacker's own organization and no victim interaction.
Affected software
Flowise
How to mitigate CVE-2026-91930
Install security update from vendor's website.
Flowise - update to 3.1.4