Missing Authorization in Flowise - CVE-2026-90533
Published: August 31, 2026 / Updated: September 14, 2026
Vulnerability identifier: #VU146335
CSH Severity: Low
CVSS v4: 6 [CVSS:4.0/AV:N/AC:L/AT:P/PR:L/UI:N/VC:H/VI:N/VA:N/SC:N/SI:N/SA:N]
CVE-ID: CVE-2026-90533
CWE-ID: CWE-862
Exploitation vector: Remote access
Exploit availability:
No public exploit available
Vulnerability details
The vulnerability allows a remote user to disclose sensitive information.
The vulnerability exists due to improper access control in GET /api/v1/organizationuser when handling authenticated requests for organization user records. A remote user can send a specially crafted request with a userId parameter to disclose sensitive information.
The issue exposes the organization owner\'s bcrypt password hash and may also expose tempToken and tokenExpiry fields; querying the requester\'s own userId can still return the owner\'s attached user record, and no victim interaction is required.
Affected software
Flowise
How to mitigate CVE-2026-90533
Install security update from vendor's website.
Flowise - update to 3.1.4