CVE-2026-90533CWE-862broken-access-control

CVE-2026-90533

Medium · published September 12, 2026

CVSS v3.1
6.5
EPSS
0%
Percentile
25.6
In the wild
Unconfirmed
What it is

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.

The record
Technical detail
CVSS v3.1
6.5 · MEDIUM
Vector
CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:N/A:N
CVSS v4.0
6.0 · 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
EPSS
0.00335 · 25.6th percentile
Weakness
CWE-862 · Missing Authorization
Published
2026-09-12T17:16Z
Affected products (1)
ProductVersionsFixed in
flowiseai/flowise< 3.1.43.1.4
References (3)
https://github.com/FlowiseAI/Flowise/security/advisories/GHSA-fhxm-xxcx-g6x3 · [email protected]https://www.vulncheck.com/advisories/flowise-before-3.1.4-broken-access-control-via-organizationuser · [email protected]https://github.com/FlowiseAI/Flowise/security/advisories/GHSA-fhxm-xxcx-g6x3 · 134c704f-9b21-4f2e-91b3-4a467353bcc0
EPSS history
Timeline
  • 14 SEP 03:24Z
    EPSS moved — → 0%
    epss
  • 12 SEP 12:08Z
    Flowise before 3.1.4 Broken Access Control via organizationuser
    cvelistv5