Vulnerability · Published Sep 12, 2026 · Assigned by VulnCheck

CVE-2026-90533Flowise before 3.1.4 Broken Access Control via organizationuser

Medium 6.0

In plain English

A medium-severity missing authorization in Flowise from FlowiseAI. Proof-of-concept exploit code is public. The chance it is exploited in the next 30 days is estimated at 0.3% (higher than 27% of all known vulnerabilities).

Severity (CVSS 4.0)6.0Medium

Exploit odds (30 days)0.3%top 73.0% of all CVEs

Exploited in the wildNo reportsCISA SSVC: poc

Attack toolingNoneno public tooling known

Official description

Flowise before 3.1.4 contains a broken access control vulnerability in GET /api/v1/organizationuser that allows any authenticated organization member to retrieve the organization owner's full user record including bcrypt password hash and temporary tokens. Attackers can query the endpoint with any user ID to obtain the owner's credential hash for offline cracking, enabling account takeover of the highest-privileged account.

Affected products (as reported)

Vendor	Product	Versions
FlowiseAI	Flowise	0 – before 3.1.4

Weakness: CWE-862 · Vector: CVSS:4.0/AV:N/AC:H/AT:N/PR:L/UI:N/VC:H/VI:N/VA:N/SC:N/SI:N/SA:N

References

GitHub Security Advisory (GHSA-fhxm-xxcx-g6x3) vendor-advisory
VulnCheck Advisory: Flowise before 3.1.4 Broken Access Control via organizationuser third-party-advisory