SB2026050498 - Improper access control in Flowise
Published: May 4, 2026
Security Bulletin ID
SB2026050498
CSH Severity
Medium
Patch available
YES
Number of vulnerabilities
1
Exploitation vector
Remote access
Highest impact
Data manipulation
Breakdown by Severity
- Low
- Medium
- High
- Critical
Description
This security bulletin contains information about 1 vulnerability.
1) Improper access control (CVE-ID: N/A)
CWE-ID: CWE-284 - Improper Access Control
CVSSv4: CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:L/VI:L/VA:N/SC:N/SI:N/SA:N/E:U/U:Green
The vulnerability allows a remote attacker to bypass authentication.
The vulnerability exists due to improper access control in the /api/v1/account/register endpoint when handling registration requests. A remote attacker can send a specially crafted request to bypass authentication.
This affects on-premise deployments and can be exploited after the organization setup has been completed.
Remediation
Install update from vendor's website.